31314231 has 12 divisors (see below), whose sum is σ = 48711208. Its totient is φ = 19270224.

The previous prime is 31314197. The next prime is 31314251. The reversal of 31314231 is 13241313.

It is not a de Polignac number, because 31314231 - 2⁷ = 31314103 is a prime.

It is a super-2 number, since 2×31314231² = 1961162126242722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31314251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133705 + ... + 133938.

Almost surely, 2^31314231 is an apocalyptic number.

31314231 is a deficient number, since it is larger than the sum of its proper divisors (17396977).

31314231 is a wasteful number, since it uses less digits than its factorization.

31314231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267662 (or 267659 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31314231 is about 5595.9119900156. The cubic root of 31314231 is about 315.1959174265.

Adding to 31314231 its reverse (13241313), we get a palindrome (44555544).

The spelling of 31314231 in words is "thirty-one million, three hundred fourteen thousand, two hundred thirty-one".