57631 has 4 divisors (see below), whose sum is σ = 65872.
Its totient is φ = 49392.
The previous prime is 57601. The next prime is 57637. The reversal of 57631 is 13675.
Subtracting from 57631 its reverse (13675), we obtain a triangular number (43956 = T296).
57631 is nontrivially palindromic in base 13 and base 15.
57631 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 57631 - 27 = 57503 is a prime.
It is a super-2 number, since 2×576312 = 6642664322, which contains 22 as substring.
It is a pancake number, because a pancake can be divided into 57631 parts by 339 straight cuts.
It is a Duffinian number.
57631 is an undulating number in base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (57637) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4110 + ... + 4123.
It is an arithmetic number, because the mean of its divisors is an integer number (16468).
257631 is an apocalyptic number.
57631 is a deficient number, since it is larger than the sum of its proper divisors (8241).
57631 is an equidigital number, since it uses as much as digits as its factorization.
57631 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8240.
The product of its digits is 630, while the sum is 22.
The square root of 57631 is about 240.0645746461.
The cubic root of 57631 is about 38.6265024220.
The spelling of 57631 in words is "fifty-seven thousand, six hundred thirty-one".