51870444 has 24 divisors (see below), whose sum is σ = 125205360. Its totient is φ = 16693824.

The previous prime is 51870421. The next prime is 51870449. The reversal of 51870444 is 44407815.

51870444 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is not an unprimeable number, because it can be changed into a prime (51870449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74179 + ... + 74874.

It is an arithmetic number, because the mean of its divisors is an integer number (5216890).

Almost surely, 2^51870444 is an apocalyptic number.

It is an amenable number.

51870444 is an abundant number, since it is smaller than the sum of its proper divisors (73334916).

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

51870444 is a wasteful number, since it uses less digits than its factorization.

51870444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149089 (or 149087 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 51870444 is about 7202.1138563619. The cubic root of 51870444 is about 372.9408776239.

The spelling of 51870444 in words is "fifty-one million, eight hundred seventy thousand, four hundred forty-four".