31344312 has 32 divisors (see below), whose sum is σ = 78558480. Its totient is φ = 10421760.

The previous prime is 31344307. The next prime is 31344329. The reversal of 31344312 is 21344313.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9648 + ... + 12480.

Almost surely, 2^31344312 is an apocalyptic number.

It is an amenable number.

31344312 is an abundant number, since it is smaller than the sum of its proper divisors (47214168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31344312 is a wasteful number, since it uses less digits than its factorization.

31344312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303 (or 3299 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 31344312 is about 5598.5991104918. The cubic root of 31344312 is about 315.2968127033.

Adding to 31344312 its reverse (21344313), we get a palindrome (52688625).

Subtracting from 31344312 its reverse (21344313), we obtain a palindrome (9999999).

The spelling of 31344312 in words is "thirty-one million, three hundred forty-four thousand, three hundred twelve".