51406688 has 24 divisors (see below), whose sum is σ = 102721752. Its totient is φ = 25318656.

The previous prime is 51406681. The next prime is 51406697. The reversal of 51406688 is 88660415.

It is a super-2 number, since 2×51406688² = 5285295142258688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51406681) 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, 9845 + ... + 14132.

It is an arithmetic number, because the mean of its divisors is an integer number (4280073).

Almost surely, 2^51406688 is an apocalyptic number.

It is an amenable number.

51406688 is a deficient number, since it is larger than the sum of its proper divisors (51315064).

51406688 is a wasteful number, since it uses less digits than its factorization.

51406688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24054 (or 24046 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 51406688 is about 7169.8457445052. The cubic root of 51406688 is about 371.8261028664.

The spelling of 51406688 in words is "fifty-one million, four hundred six thousand, six hundred eighty-eight".