51479764 has 24 divisors (see below), whose sum is σ = 105473088. Its totient is φ = 21524160.

The previous prime is 51479737. The next prime is 51479767. The reversal of 51479764 is 46797415.

It is a super-2 number, since 2×51479764² = 5300332202991392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51479764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51479767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21274 + ... + 23569.

It is an arithmetic number, because the mean of its divisors is an integer number (4394712).

Almost surely, 2^51479764 is an apocalyptic number.

It is an amenable number.

51479764 is an abundant number, since it is smaller than the sum of its proper divisors (53993324).

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

51479764 is a wasteful number, since it uses less digits than its factorization.

51479764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44895 (or 44893 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 51479764 is about 7174.9399997491. The cubic root of 51479764 is about 372.0022064077.

The spelling of 51479764 in words is "fifty-one million, four hundred seventy-nine thousand, seven hundred sixty-four".