57211355 has 4 divisors (see below), whose sum is σ = 68653632. Its totient is φ = 45769080.

The previous prime is 57211331. The next prime is 57211387. The reversal of 57211355 is 55311275.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 57211355 - 2¹⁰ = 57210331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5721131 + ... + 5721140.

It is an arithmetic number, because the mean of its divisors is an integer number (17163408).

Almost surely, 2^57211355 is an apocalyptic number.

57211355 is a deficient number, since it is larger than the sum of its proper divisors (11442277).

57211355 is a wasteful number, since it uses less digits than its factorization.

57211355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11442276.

The product of its digits is 5250, while the sum is 29.

The square root of 57211355 is about 7563.8188106273. The cubic root of 57211355 is about 385.3251988966.

The spelling of 57211355 in words is "fifty-seven million, two hundred eleven thousand, three hundred fifty-five".