57142251 has 6 divisors (see below), whose sum is σ = 82538820. Its totient is φ = 38094828.

The previous prime is 57142231. The next prime is 57142279. The reversal of 57142251 is 15224175.

57142251 is a `hidden beast` number, since 571 + 42 + 2 + 51 = 666.

It is not a de Polignac number, because 57142251 - 2⁶ = 57142187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57142231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3174561 + ... + 3174578.

It is an arithmetic number, because the mean of its divisors is an integer number (13756470).

Almost surely, 2^57142251 is an apocalyptic number.

57142251 is a deficient number, since it is larger than the sum of its proper divisors (25396569).

57142251 is a wasteful number, since it uses less digits than its factorization.

57142251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349145 (or 6349142 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 57142251 is about 7559.2493674967. The cubic root of 57142251 is about 385.1699952043.

The spelling of 57142251 in words is "fifty-seven million, one hundred forty-two thousand, two hundred fifty-one".