31213464 has 32 divisors (see below), whose sum is σ = 79939440. Its totient is φ = 10150400.

The previous prime is 31213433. The next prime is 31213477. The reversal of 31213464 is 46431213.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14877 + ... + 16844.

Almost surely, 2^31213464 is an apocalyptic number.

It is an amenable number.

31213464 is an abundant number, since it is smaller than the sum of its proper divisors (48725976).

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

31213464 is a wasteful number, since it uses less digits than its factorization.

31213464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31771 (or 31767 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 31213464 is about 5586.9011088438. The cubic root of 31213464 is about 314.8574613356.

Adding to 31213464 its reverse (46431213), we get a palindrome (77644677).

The spelling of 31213464 in words is "thirty-one million, two hundred thirteen thousand, four hundred sixty-four".