51651672 has 16 divisors (see below), whose sum is σ = 129129240. Its totient is φ = 17217216.

The previous prime is 51651659. The next prime is 51651679. The reversal of 51651672 is 27615615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651679) 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, 1076053 + ... + 1076100.

Almost surely, 2^51651672 is an apocalyptic number.

It is an amenable number.

51651672 is an abundant number, since it is smaller than the sum of its proper divisors (77477568).

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

51651672 is a wasteful number, since it uses less digits than its factorization.

51651672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152162 (or 2152158 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 51651672 is about 7186.9097670696. The cubic root of 51651672 is about 372.4158259125.

The spelling of 51651672 in words is "fifty-one million, six hundred fifty-one thousand, six hundred seventy-two".