31204016 has 20 divisors (see below), whose sum is σ = 61188792. Its totient is φ = 15413376.

The previous prime is 31204013. The next prime is 31204021. The reversal of 31204016 is 61040213.

It is a super-2 number, since 2×31204016² = 1947381229056512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31203985 and 31204003.

It is not an unprimeable number, because it can be changed into a prime (31204013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10421 + ... + 13076.

Almost surely, 2^31204016 is an apocalyptic number.

It is an amenable number.

31204016 is a deficient number, since it is larger than the sum of its proper divisors (29984776).

31204016 is a wasteful number, since it uses less digits than its factorization.

31204016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23588 (or 23582 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31204016 is about 5586.0554956069. The cubic root of 31204016 is about 314.8256900729.

Adding to 31204016 its reverse (61040213), we get a palindrome (92244229).

The spelling of 31204016 in words is "thirty-one million, two hundred four thousand, sixteen".