31204424 has 16 divisors (see below), whose sum is σ = 58734720. Its totient is φ = 15541840.

The previous prime is 31204423. The next prime is 31204427. The reversal of 31204424 is 42440213.

It is a junction number, because it is equal to n+sod(n) for n = 31204396 and 31204405.

It is not an unprimeable number, because it can be changed into a prime (31204421) 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, 5312 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (3670920).

Almost surely, 2^31204424 is an apocalyptic number.

It is an amenable number.

31204424 is a deficient number, since it is larger than the sum of its proper divisors (27530296).

31204424 is a wasteful number, since it uses less digits than its factorization.

31204424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15100 (or 15096 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31204424 is about 5586.0920149958. The cubic root of 31204424 is about 314.8270622075.

Adding to 31204424 its reverse (42440213), we get a palindrome (73644637).

The spelling of 31204424 in words is "thirty-one million, two hundred four thousand, four hundred twenty-four".