57142231 has 2 divisors, whose sum is σ = 57142232. Its totient is φ = 57142230.

The previous prime is 57142213. The next prime is 57142279. The reversal of 57142231 is 13224175.

It is a happy number.

Together with previous prime (57142213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57142231 - 2⁵ = 57142199 is a prime.

It is a super-2 number, since 2×57142231² = 6530469127314722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57142196 and 57142205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57149231) 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 as a sum of consecutive naturals, namely, 28571115 + 28571116.

It is an arithmetic number, because the mean of its divisors is an integer number (28571116).

Almost surely, 2^57142231 is an apocalyptic number.

57142231 is a deficient number, since it is larger than the sum of its proper divisors (1).

57142231 is an equidigital number, since it uses as much as digits as its factorization.

57142231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 57142231 is about 7559.2480446140. The cubic root of 57142231 is about 385.1699502673.

The spelling of 57142231 in words is "fifty-seven million, one hundred forty-two thousand, two hundred thirty-one".