51605612 has 6 divisors (see below), whose sum is σ = 90309828. Its totient is φ = 25802804.

The previous prime is 51605551. The next prime is 51605641. The reversal of 51605612 is 21650615.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450698 + ... + 6450705.

It is an arithmetic number, because the mean of its divisors is an integer number (15051638).

Almost surely, 2^51605612 is an apocalyptic number.

It is an amenable number.

51605612 is a deficient number, since it is larger than the sum of its proper divisors (38704216).

51605612 is a wasteful number, since it uses less digits than its factorization.

51605612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901407 (or 12901405 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51605612 is about 7183.7046153082. The cubic root of 51605612 is about 372.3050932964.

The spelling of 51605612 in words is "fifty-one million, six hundred five thousand, six hundred twelve".