57156899 has 4 divisors (see below), whose sum is σ = 58125720. Its totient is φ = 56188080.

The previous prime is 57156859. The next prime is 57156929. The reversal of 57156899 is 99865175.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57156899 is a prime.

It is a super-2 number, since 2×57156899² = 6533822206592402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57156859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484322 + ... + 484439.

It is an arithmetic number, because the mean of its divisors is an integer number (14531430).

Almost surely, 2^57156899 is an apocalyptic number.

57156899 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

57156899 is a deficient number, since it is larger than the sum of its proper divisors (968821).

57156899 is an equidigital number, since it uses as much as digits as its factorization.

57156899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968820.

The product of its digits is 680400, while the sum is 50.

The square root of 57156899 is about 7560.2181846822. The cubic root of 57156899 is about 385.2029042338.

The spelling of 57156899 in words is "fifty-seven million, one hundred fifty-six thousand, eight hundred ninety-nine".