51537897 has 32 divisors (see below), whose sum is σ = 82598400. Its totient is φ = 31636224.

The previous prime is 51537881. The next prime is 51537907. The reversal of 51537897 is 79873515.

It is not a de Polignac number, because 51537897 - 2⁴ = 51537881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51537817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20379 + ... + 22767.

It is an arithmetic number, because the mean of its divisors is an integer number (2581200).

Almost surely, 2^51537897 is an apocalyptic number.

It is an amenable number.

51537897 is a deficient number, since it is larger than the sum of its proper divisors (31060503).

51537897 is a wasteful number, since it uses less digits than its factorization.

51537897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462 (or 2456 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 51537897 is about 7178.9899707410. The cubic root of 51537897 is about 372.1421803024.

The spelling of 51537897 in words is "fifty-one million, five hundred thirty-seven thousand, eight hundred ninety-seven".