51392680 has 32 divisors (see below), whose sum is σ = 118457640. Its totient is φ = 20055040.

The previous prime is 51392659. The next prime is 51392681. The reversal of 51392680 is 8629315.

It can be written as a sum of positive squares in 4 ways, for example, as 41242084 + 10150596 = 6422^2 + 3186^2 .

It is not an unprimeable number, because it can be changed into a prime (51392681) 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, 14029 + ... + 17308.

Almost surely, 2^51392680 is an apocalyptic number.

It is an amenable number.

51392680 is an abundant number, since it is smaller than the sum of its proper divisors (67064960).

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

51392680 is a wasteful number, since it uses less digits than its factorization.

51392680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31389 (or 31385 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 51392680 is about 7168.8688089545. The cubic root of 51392680 is about 371.7923263714.

The spelling of 51392680 in words is "fifty-one million, three hundred ninety-two thousand, six hundred eighty".