51558912 has 120 divisors (see below), whose sum is σ = 151927776. Its totient is φ = 16828416.

The previous prime is 51558901. The next prime is 51558931. The reversal of 51558912 is 21985515.

It is a happy number.

51558912 is a `hidden beast` number, since 515 + 58 + 91 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308653 + ... + 308819.

Almost surely, 2^51558912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51558912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75963888).

51558912 is an abundant number, since it is smaller than the sum of its proper divisors (100368864).

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

51558912 is a wasteful number, since it uses less digits than its factorization.

51558912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 239 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 51558912 is about 7180.4534675743. The cubic root of 51558912 is about 372.1927547706.

The spelling of 51558912 in words is "fifty-one million, five hundred fifty-eight thousand, nine hundred twelve".