51408656 has 40 divisors (see below), whose sum is σ = 107701440. Its totient is φ = 23630976.

The previous prime is 51408653. The next prime is 51408659. The reversal of 51408656 is 65680415.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51408653) and next prime (51408659).

It is not an unprimeable number, because it can be changed into a prime (51408653) 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, 91031 + ... + 91593.

It is an arithmetic number, because the mean of its divisors is an integer number (2692536).

Almost surely, 2^51408656 is an apocalyptic number.

It is an amenable number.

51408656 is an abundant number, since it is smaller than the sum of its proper divisors (56292784).

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

51408656 is a wasteful number, since it uses less digits than its factorization.

51408656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 51408656 is about 7169.9829846381. The cubic root of 51408656 is about 371.8308476733.

The spelling of 51408656 in words is "fifty-one million, four hundred eight thousand, six hundred fifty-six".