57431 has 8 divisors (see below), whose sum is σ = 65664. Its totient is φ = 49720.

The previous prime is 57427. The next prime is 57457. The reversal of 57431 is 13475.

It is a happy number.

57431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57431 - 2² = 57427 is a prime.

It is a super-2 number, since 2×57431² = 6596639522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 366.

It is an arithmetic number, because the mean of its divisors is an integer number (8208).

2⁵⁷⁴³¹ is an apocalyptic number.

57431 is a deficient number, since it is larger than the sum of its proper divisors (8233).

57431 is a wasteful number, since it uses less digits than its factorization.

57431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its digits is 420, while the sum is 20.

The square root of 57431 is about 239.6476580315. The cubic root of 57431 is about 38.5817680819.

Subtracting from 57431 its reverse (13475), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 57431 in words is "fifty-seven thousand, four hundred thirty-one".