51700688 has 80 divisors (see below), whose sum is σ = 114742656. Its totient is φ = 22387200.

The previous prime is 51700679. The next prime is 51700703. The reversal of 51700688 is 88600715.

It is a happy number.

It is a super-2 number, since 2×51700688² = 5345922279346688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483131 + ... + 483237.

Almost surely, 2^51700688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51700688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57371328).

51700688 is an abundant number, since it is smaller than the sum of its proper divisors (63041968).

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

51700688 is a wasteful number, since it uses less digits than its factorization.

51700688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 51700688 is about 7190.3190471633. The cubic root of 51700688 is about 372.5335927544.

The spelling of 51700688 in words is "fifty-one million, seven hundred thousand, six hundred eighty-eight".