51486912 has 42 divisors (see below), whose sum is σ = 147579588. Its totient is φ = 17162112.

The previous prime is 51486899. The next prime is 51486917. The reversal of 51486912 is 21968415.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51486917) 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, 44118 + ... + 45269.

Almost surely, 2^51486912 is an apocalyptic number.

It is an amenable number.

51486912 is an abundant number, since it is smaller than the sum of its proper divisors (96092676).

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

51486912 is a wasteful number, since it uses less digits than its factorization.

51486912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89405 (or 89392 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 51486912 is about 7175.4381050916. The cubic root of 51486912 is about 372.0194231967.

The spelling of 51486912 in words is "fifty-one million, four hundred eighty-six thousand, nine hundred twelve".