31045131 has 18 divisors (see below), whose sum is σ = 48560148. Its totient is φ = 19103760.

The previous prime is 31045129. The next prime is 31045139. The reversal of 31045131 is 13154013.

It is not a de Polignac number, because 31045131 - 2¹ = 31045129 is a prime.

It is a super-2 number, since 2×31045131² = 1927600317614322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31045139) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8685 + ... + 11726.

It is an arithmetic number, because the mean of its divisors is an integer number (2697786).

Almost surely, 2^31045131 is an apocalyptic number.

31045131 is a deficient number, since it is larger than the sum of its proper divisors (17515017).

31045131 is a wasteful number, since it uses less digits than its factorization.

31045131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20443 (or 20427 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 31045131 is about 5571.8157722595. The cubic root of 31045131 is about 314.2904361058.

Adding to 31045131 its reverse (13154013), we get a palindrome (44199144).

The spelling of 31045131 in words is "thirty-one million, forty-five thousand, one hundred thirty-one".