[go: up one dir, main page]

Search a number
-
+
51232115 = 5114719819
BaseRepresentation
bin1100001101101…
…1110101110011
310120101212020202
43003123311303
5101103411430
65030025415
71161315524
oct303336563
9116355222
1051232115
1126a124a0
12151a826b
13a7ca17c
146b3884b
15476ed45
hex30dbd73

51232115 has 16 divisors (see below), whose sum is σ = 68497920. Its totient is φ = 36465120.

The previous prime is 51232091. The next prime is 51232133. The reversal of 51232115 is 51123215.

It is a happy number.

It is not a de Polignac number, because 51232115 - 212 = 51228019 is a prime.

It is a super-3 number, since 3×512321153 (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7325 + ... + 12494.

It is an arithmetic number, because the mean of its divisors is an integer number (4281120).

Almost surely, 251232115 is an apocalyptic number.

51232115 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51232115 is a deficient number, since it is larger than the sum of its proper divisors (17265805).

51232115 is a wasteful number, since it uses less digits than its factorization.

51232115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19882.

The product of its digits is 300, while the sum is 20.

The square root of 51232115 is about 7157.6612800551. The cubic root of 51232115 is about 371.4047282877.

Subtracting from 51232115 its reverse (51123215), we obtain a square (108900 = 3302).

The spelling of 51232115 in words is "fifty-one million, two hundred thirty-two thousand, one hundred fifteen".

Divisors: 1 5 11 47 55 235 517 2585 19819 99095 218009 931493 1090045 4657465 10246423 51232115