57156147 has 12 divisors (see below), whose sum is σ = 82624464. Its totient is φ = 38073840.

The previous prime is 57156107. The next prime is 57156149. The reversal of 57156147 is 74165175.

57156147 is a `hidden beast` number, since 57 + 1 + 561 + 47 = 666.

It is not a de Polignac number, because 57156147 - 2⁷ = 57156019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57156149) 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 11 ways as a sum of consecutive naturals, for example, 20497 + ... + 23117.

It is an arithmetic number, because the mean of its divisors is an integer number (6885372).

Almost surely, 2^57156147 is an apocalyptic number.

57156147 is a deficient number, since it is larger than the sum of its proper divisors (25468317).

57156147 is a wasteful number, since it uses less digits than its factorization.

57156147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5047 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 57156147 is about 7560.1684505043. The cubic root of 57156147 is about 385.2012148847.

Subtracting 57156147 from its reverse (74165175), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 57156147 in words is "fifty-seven million, one hundred fifty-six thousand, one hundred forty-seven".