51351312 has 20 divisors (see below), whose sum is σ = 132657680. Its totient is φ = 17117088.

The previous prime is 51351253. The next prime is 51351359. The reversal of 51351312 is 21315315.

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, 534862 + ... + 534957.

It is an arithmetic number, because the mean of its divisors is an integer number (6632884).

Almost surely, 2^51351312 is an apocalyptic number.

It is an amenable number.

51351312 is an abundant number, since it is smaller than the sum of its proper divisors (81306368).

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

51351312 is a wasteful number, since it uses less digits than its factorization.

51351312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069830 (or 1069824 counting only the distinct ones).

The product of its digits is 450, while the sum is 21.

The square root of 51351312 is about 7165.9829751403. The cubic root of 51351312 is about 371.6925428124.

Adding to 51351312 its reverse (21315315), we get a palindrome (72666627).

The spelling of 51351312 in words is "fifty-one million, three hundred fifty-one thousand, three hundred twelve".