51812544 has 112 divisors (see below), whose sum is σ = 164998400. Its totient is φ = 14017536.

The previous prime is 51812539. The next prime is 51812567. The reversal of 51812544 is 44521815.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24522 + ... + 26550.

It is an arithmetic number, because the mean of its divisors is an integer number (1473200).

Almost surely, 2^51812544 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 51812544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82499200).

51812544 is an abundant number, since it is smaller than the sum of its proper divisors (113185856).

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

51812544 is a wasteful number, since it uses less digits than its factorization.

51812544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070 (or 2060 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 51812544 is about 7198.0930808097. The cubic root of 51812544 is about 372.8020617936.

The spelling of 51812544 in words is "fifty-one million, eight hundred twelve thousand, five hundred forty-four".