57221590320 has 320 divisors, whose sum is σ = 199272960000. Its totient is φ = 15091743744.

The previous prime is 57221590297. The next prime is 57221590367. The reversal of 57221590320 is 2309512275.

57221590320 is a `hidden beast` number, since 572 + 2 + 1 + 59 + 0 + 32 + 0 = 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 63 ways as a sum of consecutive naturals, for example, 102731482 + ... + 102732038.

It is an arithmetic number, because the mean of its divisors is an integer number (622728000).

Almost surely, 2^57221590320 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 57221590320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99636480000).

57221590320 is an abundant number, since it is smaller than the sum of its proper divisors (142051369680).

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

57221590320 is a wasteful number, since it uses less digits than its factorization.

57221590320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 57221590320 in words is "fifty-seven billion, two hundred twenty-one million, five hundred ninety thousand, three hundred twenty".