31140232 has 16 divisors (see below), whose sum is σ = 58499100. Its totient is φ = 15540480.

The previous prime is 31140191. The next prime is 31140233. The reversal of 31140232 is 23204113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31069476 + 70756 = 5574^2 + 266^2 .

It is not an unprimeable number, because it can be changed into a prime (31140233) 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, 1132 + ... + 7972.

Almost surely, 2^31140232 is an apocalyptic number.

It is an amenable number.

31140232 is a deficient number, since it is larger than the sum of its proper divisors (27358868).

31140232 is a wasteful number, since it uses less digits than its factorization.

31140232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7416 (or 7412 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31140232 is about 5580.3433586115. The cubic root of 31140232 is about 314.6110324493.

Adding to 31140232 its reverse (23204113), we get a palindrome (54344345).

The spelling of 31140232 in words is "thirty-one million, one hundred forty thousand, two hundred thirty-two".