57211880 has 32 divisors (see below), whose sum is σ = 140430240. Its totient is φ = 20804160.

The previous prime is 57211877. The next prime is 57211883. The reversal of 57211880 is 8811275.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57211877) and next prime (57211883).

It is not an unprimeable number, because it can be changed into a prime (57211883) 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, 64574 + ... + 65453.

It is an arithmetic number, because the mean of its divisors is an integer number (4388445).

Almost surely, 2^57211880 is an apocalyptic number.

It is an amenable number.

57211880 is an abundant number, since it is smaller than the sum of its proper divisors (83218360).

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

57211880 is a wasteful number, since it uses less digits than its factorization.

57211880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130049 (or 130045 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 57211880 is about 7563.8535152394. The cubic root of 57211880 is about 385.3263775386.

The spelling of 57211880 in words is "fifty-seven million, two hundred eleven thousand, eight hundred eighty".