51630872 has 16 divisors (see below), whose sum is σ = 99931200. Its totient is φ = 24982560.

The previous prime is 51630871. The next prime is 51630881. The reversal of 51630872 is 27803615.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51630871) 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, 103847 + ... + 104342.

It is an arithmetic number, because the mean of its divisors is an integer number (6245700).

Almost surely, 2^51630872 is an apocalyptic number.

It is an amenable number.

51630872 is a deficient number, since it is larger than the sum of its proper divisors (48300328).

51630872 is a wasteful number, since it uses less digits than its factorization.

51630872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208226 (or 208222 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51630872 is about 7185.4625460022. The cubic root of 51630872 is about 372.3658288913.

The spelling of 51630872 in words is "fifty-one million, six hundred thirty thousand, eight hundred seventy-two".