31212404 has 12 divisors (see below), whose sum is σ = 54700800. Its totient is φ = 15583608.

The previous prime is 31212397. The next prime is 31212413. The reversal of 31212404 is 40421213.

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 3 ways as a sum of consecutive naturals, for example, 2324 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (4558400).

Almost surely, 2^31212404 is an apocalyptic number.

It is an amenable number.

31212404 is a deficient number, since it is larger than the sum of its proper divisors (23488396).

31212404 is a wasteful number, since it uses less digits than its factorization.

31212404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11302 (or 11300 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31212404 is about 5586.8062432843. The cubic root of 31212404 is about 314.8538971399.

Adding to 31212404 its reverse (40421213), we get a palindrome (71633617).

The spelling of 31212404 in words is "thirty-one million, two hundred twelve thousand, four hundred four".