57431812220 has 24 divisors (see below), whose sum is σ = 123411616944. Its totient is φ = 22438475136.

The previous prime is 57431812219. The next prime is 57431812237. The reversal of 57431812220 is 2221813475.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33389729 + ... + 33391448.

It is an arithmetic number, because the mean of its divisors is an integer number (5142150706).

Almost surely, 2^57431812220 is an apocalyptic number.

It is an amenable number.

57431812220 is an abundant number, since it is smaller than the sum of its proper divisors (65979804724).

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

57431812220 is a wasteful number, since it uses less digits than its factorization.

57431812220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66781229 (or 66781227 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 57431812220 in words is "fifty-seven billion, four hundred thirty-one million, eight hundred twelve thousand, two hundred twenty".