57138147 has 12 divisors (see below), whose sum is σ = 90036024. Its totient is φ = 34629120.

The previous prime is 57138143. The next prime is 57138181. The reversal of 57138147 is 74183175.

57138147 is a `hidden beast` number, since 571 + 3 + 81 + 4 + 7 = 666.

It is not a de Polignac number, because 57138147 - 2² = 57138143 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (57138143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288478 + ... + 288675.

It is an arithmetic number, because the mean of its divisors is an integer number (7503002).

Almost surely, 2^57138147 is an apocalyptic number.

57138147 is a deficient number, since it is larger than the sum of its proper divisors (32897877).

57138147 is a wasteful number, since it uses less digits than its factorization.

57138147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577170 (or 577167 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 57138147 is about 7558.9779070983. The cubic root of 57138147 is about 385.1607739160.

The spelling of 57138147 in words is "fifty-seven million, one hundred thirty-eight thousand, one hundred forty-seven".