51507264 has 28 divisors (see below), whose sum is σ = 136280144. Its totient is φ = 17169024.

The previous prime is 51507259. The next prime is 51507283. The reversal of 51507264 is 46270515.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133942 + ... + 134325.

It is an arithmetic number, because the mean of its divisors is an integer number (4867148).

Almost surely, 2^51507264 is an apocalyptic number.

It is an amenable number.

51507264 is an abundant number, since it is smaller than the sum of its proper divisors (84772880).

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

51507264 is a wasteful number, since it uses less digits than its factorization.

51507264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268282 (or 268272 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 51507264 is about 7176.8561362201. The cubic root of 51507264 is about 372.0684346290.

Adding to 51507264 its reverse (46270515), we get a palindrome (97777779).

The spelling of 51507264 in words is "fifty-one million, five hundred seven thousand, two hundred sixty-four".