57162139 has 4 divisors (see below), whose sum is σ = 57945256. Its totient is φ = 56379024.

The previous prime is 57162137. The next prime is 57162163. The reversal of 57162139 is 93126175.

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

It is a cyclic number.

It is not a de Polignac number, because 57162139 - 2¹ = 57162137 is a prime.

It is a super-3 number, since 3×57162139³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57162137) 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, 391449 + ... + 391594.

It is an arithmetic number, because the mean of its divisors is an integer number (14486314).

Almost surely, 2^57162139 is an apocalyptic number.

57162139 is a deficient number, since it is larger than the sum of its proper divisors (783117).

57162139 is an equidigital number, since it uses as much as digits as its factorization.

57162139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783116.

The product of its digits is 11340, while the sum is 34.

The square root of 57162139 is about 7560.5647275848. The cubic root of 57162139 is about 385.2146753502.

The spelling of 57162139 in words is "fifty-seven million, one hundred sixty-two thousand, one hundred thirty-nine".