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51115244 = 22192572617
BaseRepresentation
bin1100001011111…
…1010011101100
310120011220221012
43002333103230
5101041141434
65023324352
71160321015
oct302772354
9116156835
1051115244
1126942704
12151506b8
13a788c0b
146b0800c
15474a3ce
hex30bf4ec

51115244 has 24 divisors (see below), whose sum is σ = 94562160. Its totient is φ = 24109056.

The previous prime is 51115237. The next prime is 51115247. The reversal of 51115244 is 44251115.

It is a super-2 number, since 2×511152442 = 5225536338359072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51115247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18224 + ... + 20840.

It is an arithmetic number, because the mean of its divisors is an integer number (3940090).

Almost surely, 251115244 is an apocalyptic number.

It is an amenable number.

51115244 is a deficient number, since it is larger than the sum of its proper divisors (43446916).

51115244 is a wasteful number, since it uses less digits than its factorization.

51115244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897 (or 2895 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 51115244 is about 7149.4925694066. The cubic root of 51115244 is about 371.1220963863.

Adding to 51115244 its reverse (44251115), we get a palindrome (95366359).

The spelling of 51115244 in words is "fifty-one million, one hundred fifteen thousand, two hundred forty-four".

Divisors: 1 2 4 19 38 76 257 514 1028 2617 4883 5234 9766 10468 19532 49723 99446 198892 672569 1345138 2690276 12778811 25557622 51115244