51406672 has 20 divisors (see below), whose sum is σ = 101918080. Its totient is φ = 25105248.

The previous prime is 51406669. The next prime is 51406681. The reversal of 51406672 is 27660415.

It is a happy number.

It is a super-2 number, since 2×51406672² = 5285291852231168, 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 3 ways as a sum of consecutive naturals, for example, 36672 + ... + 38047.

It is an arithmetic number, because the mean of its divisors is an integer number (5095904).

Almost surely, 2^51406672 is an apocalyptic number.

It is an amenable number.

51406672 is a deficient number, since it is larger than the sum of its proper divisors (50511408).

51406672 is a wasteful number, since it uses less digits than its factorization.

51406672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74770 (or 74764 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 51406672 is about 7169.8446287210. The cubic root of 51406672 is about 371.8260642902.

The spelling of 51406672 in words is "fifty-one million, four hundred six thousand, six hundred seventy-two".