57211444 has 12 divisors (see below), whose sum is σ = 100200100. Its totient is φ = 28582848.

The previous prime is 57211423. The next prime is 57211463. The reversal of 57211444 is 44411275.

It can be written as a sum of positive squares in 2 ways, for example, as 34363044 + 22848400 = 5862^2 + 4780^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712 + ... + 10720.

Almost surely, 2^57211444 is an apocalyptic number.

It is an amenable number.

57211444 is a deficient number, since it is larger than the sum of its proper divisors (42988656).

57211444 is a wasteful number, since it uses less digits than its factorization.

57211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11442 (or 11440 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 57211444 is about 7563.8246938966. The cubic root of 57211444 is about 385.3253987050.

The spelling of 57211444 in words is "fifty-seven million, two hundred eleven thousand, four hundred forty-four".