57211377 has 4 divisors (see below), whose sum is σ = 76281840. Its totient is φ = 38140916.

The previous prime is 57211331. The next prime is 57211387. The reversal of 57211377 is 77311275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57211377 - 2⁶ = 57211313 is a prime.

It is a super-2 number, since 2×57211377² = 6546283316472258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57211387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9535227 + ... + 9535232.

It is an arithmetic number, because the mean of its divisors is an integer number (19070460).

Almost surely, 2^57211377 is an apocalyptic number.

It is an amenable number.

57211377 is a deficient number, since it is larger than the sum of its proper divisors (19070463).

57211377 is a wasteful number, since it uses less digits than its factorization.

57211377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19070462.

The product of its digits is 10290, while the sum is 33.

The square root of 57211377 is about 7563.8202649190. The cubic root of 57211377 is about 385.3252482875.

The spelling of 57211377 in words is "fifty-seven million, two hundred eleven thousand, three hundred seventy-seven".