51612904 has 32 divisors (see below), whose sum is σ = 111121920. Its totient is φ = 22015296.

The previous prime is 51612887. The next prime is 51612907. The reversal of 51612904 is 40921615.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (51612907) 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, 10422 + ... + 14554.

It is an arithmetic number, because the mean of its divisors is an integer number (3472560).

Almost surely, 2^51612904 is an apocalyptic number.

It is an amenable number.

51612904 is an abundant number, since it is smaller than the sum of its proper divisors (59509016).

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

51612904 is a wasteful number, since it uses less digits than its factorization.

51612904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369 (or 4365 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51612904 is about 7184.2121349526. The cubic root of 51612904 is about 372.3226283459.

The spelling of 51612904 in words is "fifty-one million, six hundred twelve thousand, nine hundred four".