57131403 has 24 divisors (see below), whose sum is σ = 90296208. Its totient is φ = 32026176.

The previous prime is 57131377. The next prime is 57131413. The reversal of 57131403 is 30413175.

It is not a de Polignac number, because 57131403 - 2¹² = 57127307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57131413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4125 + ... + 11457.

It is an arithmetic number, because the mean of its divisors is an integer number (3762342).

Almost surely, 2^57131403 is an apocalyptic number.

57131403 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

57131403 is a deficient number, since it is larger than the sum of its proper divisors (33164805).

57131403 is a wasteful number, since it uses less digits than its factorization.

57131403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 57131403 is about 7558.5318018779. The cubic root of 57131403 is about 385.1456198459.

Adding to 57131403 its reverse (30413175), we get a palindrome (87544578).

The spelling of 57131403 in words is "fifty-seven million, one hundred thirty-one thousand, four hundred three".