51510631216 has 30 divisors (see below), whose sum is σ = 109699556036. Its totient is φ = 23413922400.

The previous prime is 51510631213. The next prime is 51510631223. The reversal of 51510631216 is 61213601515.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51510631213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13301430 + ... + 13305301.

Almost surely, 2^51510631216 is an apocalyptic number.

It is an amenable number.

51510631216 is an abundant number, since it is smaller than the sum of its proper divisors (58188924820).

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

51510631216 is a wasteful number, since it uses less digits than its factorization.

51510631216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26606761 (or 26606744 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 51510631216 in words is "fifty-one billion, five hundred ten million, six hundred thirty-one thousand, two hundred sixteen".