51457265 has 16 divisors (see below), whose sum is σ = 62726400. Its totient is φ = 40519872.

The previous prime is 51457247. The next prime is 51457271. The reversal of 51457265 is 56275415.

It is a cyclic number.

It is not a de Polignac number, because 51457265 - 2²² = 47262961 is a prime.

It is a super-4 number, since 4×51457265⁴ (a number of 32 digits) contains 4444 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, 143156 + ... + 143514.

It is an arithmetic number, because the mean of its divisors is an integer number (3920400).

Almost surely, 2^51457265 is an apocalyptic number.

It is an amenable number.

51457265 is a deficient number, since it is larger than the sum of its proper divisors (11269135).

51457265 is a wasteful number, since it uses less digits than its factorization.

51457265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 42000, while the sum is 35.

The square root of 51457265 is about 7173.3719407263. The cubic root of 51457265 is about 371.9480045453.

The spelling of 51457265 in words is "fifty-one million, four hundred fifty-seven thousand, two hundred sixty-five".