51697736 has 16 divisors (see below), whose sum is σ = 98381040. Its totient is φ = 25462800.

The previous prime is 51697733. The next prime is 51697741. The reversal of 51697736 is 63779615.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51697733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47690 + ... + 48761.

It is an arithmetic number, because the mean of its divisors is an integer number (6148815).

Almost surely, 2^51697736 is an apocalyptic number.

It is an amenable number.

51697736 is a deficient number, since it is larger than the sum of its proper divisors (46683304).

51697736 is a wasteful number, since it uses less digits than its factorization.

51697736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96524 (or 96520 counting only the distinct ones).

The product of its digits is 238140, while the sum is 44.

The square root of 51697736 is about 7190.1137682237. The cubic root of 51697736 is about 372.5265023259.

The spelling of 51697736 in words is "fifty-one million, six hundred ninety-seven thousand, seven hundred thirty-six".