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102115140 = 22352397121
BaseRepresentation
bin1100001011000…
…10011101000100
321010010222122020
412011202131010
5202120141030
614044403140
72346651531
oct605423504
9233128566
10102115140
1152706686
122a2464b0
131820447a
14d7c1d88
158e71510
hex6162744

102115140 has 48 divisors (see below), whose sum is σ = 287159040. Its totient is φ = 27112960.

The previous prime is 102115121. The next prime is 102115151. The reversal of 102115140 is 41511201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10780 + ... + 17900.

It is an arithmetic number, because the mean of its divisors is an integer number (5982480).

Almost surely, 2102115140 is an apocalyptic number.

102115140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102115140 is an abundant number, since it is smaller than the sum of its proper divisors (185043900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102115140 is a wasteful number, since it uses less digits than its factorization.

102115140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372 (or 7370 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 102115140 is about 10105.2036100219. The cubic root of 102115140 is about 467.4086145452.

Adding to 102115140 its reverse (41511201), we get a palindrome (143626341).

It can be divided in two parts, 10211 and 5140, that added together give a palindrome (15351).

The spelling of 102115140 in words is "one hundred two million, one hundred fifteen thousand, one hundred forty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 239 478 717 956 1195 1434 2390 2868 3585 4780 7121 7170 14242 14340 21363 28484 35605 42726 71210 85452 106815 142420 213630 427260 1701919 3403838 5105757 6807676 8509595 10211514 17019190 20423028 25528785 34038380 51057570 102115140