57167891 has 4 divisors (see below), whose sum is σ = 62364984. Its totient is φ = 51970800.

The previous prime is 57167881. The next prime is 57167893. The reversal of 57167891 is 19876175.

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 57167891 - 2¹⁰ = 57166867 is a prime.

It is a super-2 number, since 2×57167891² = 6536335522775762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57167893) 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, 2598530 + ... + 2598551.

It is an arithmetic number, because the mean of its divisors is an integer number (15591246).

Almost surely, 2^57167891 is an apocalyptic number.

57167891 is a deficient number, since it is larger than the sum of its proper divisors (5197093).

57167891 is a wasteful number, since it uses less digits than its factorization.

57167891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197092.

The product of its digits is 105840, while the sum is 44.

The square root of 57167891 is about 7560.9451128811. The cubic root of 57167891 is about 385.2275957933.

The spelling of 57167891 in words is "fifty-seven million, one hundred sixty-seven thousand, eight hundred ninety-one".