51869656 has 16 divisors (see below), whose sum is σ = 97621200. Its totient is φ = 25837344.

The previous prime is 51869651. The next prime is 51869681. The reversal of 51869656 is 65696815.

It is a super-2 number, since 2×51869656² = 5380922427116672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51869651) 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, 9900 + ... + 14203.

It is an arithmetic number, because the mean of its divisors is an integer number (6101325).

Almost surely, 2^51869656 is an apocalyptic number.

It is an amenable number.

51869656 is a deficient number, since it is larger than the sum of its proper divisors (45751544).

51869656 is a wasteful number, since it uses less digits than its factorization.

51869656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24378 (or 24374 counting only the distinct ones).

The product of its digits is 388800, while the sum is 46.

The square root of 51869656 is about 7202.0591499931. The cubic root of 51869656 is about 372.9389890795.

It can be divided in two parts, 51869 and 656, that added together give a palindrome (52525).

The spelling of 51869656 in words is "fifty-one million, eight hundred sixty-nine thousand, six hundred fifty-six".