51630636 has 12 divisors (see below), whose sum is σ = 120471512. Its totient is φ = 17210208.

The previous prime is 51630613. The next prime is 51630641. The reversal of 51630636 is 63603615.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2151265 + ... + 2151288.

Almost surely, 2^51630636 is an apocalyptic number.

It is an amenable number.

51630636 is an abundant number, since it is smaller than the sum of its proper divisors (68840876).

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

51630636 is a wasteful number, since it uses less digits than its factorization.

51630636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302560 (or 4302558 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 51630636 is about 7185.4461239369. The cubic root of 51630636 is about 372.3652615404.

The spelling of 51630636 in words is "fifty-one million, six hundred thirty thousand, six hundred thirty-six".