31307104 has 12 divisors (see below), whose sum is σ = 61635924. Its totient is φ = 15653536.

The previous prime is 31307099. The next prime is 31307119. The reversal of 31307104 is 40170313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489142 + ... + 489205.

It is an arithmetic number, because the mean of its divisors is an integer number (5136327).

Almost surely, 2^31307104 is an apocalyptic number.

It is an amenable number.

31307104 is a deficient number, since it is larger than the sum of its proper divisors (30328820).

31307104 is an equidigital number, since it uses as much as digits as its factorization.

31307104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978357 (or 978349 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 31307104 is about 5595.2751496240. The cubic root of 31307104 is about 315.1720031478.

Adding to 31307104 its reverse (40170313), we get a palindrome (71477417).

The spelling of 31307104 in words is "thirty-one million, three hundred seven thousand, one hundred four".