31000104 has 32 divisors (see below), whose sum is σ = 86112000. Its totient is φ = 10333296.

The previous prime is 31000087. The next prime is 31000127. The reversal of 31000104 is 40100013.

It is a super-2 number, since 2×31000104² = 1922012896021632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71544 + ... + 71975.

It is an arithmetic number, because the mean of its divisors is an integer number (2691000).

Almost surely, 2^31000104 is an apocalyptic number.

It is an amenable number.

31000104 is an abundant number, since it is smaller than the sum of its proper divisors (55111896).

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

31000104 is a wasteful number, since it uses less digits than its factorization.

31000104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143534 (or 143524 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 31000104 is about 5567.7737022979. The cubic root of 31000104 is about 314.1384165329.

Adding to 31000104 its reverse (40100013), we get a palindrome (71100117).

Subtracting 31000104 from its reverse (40100013), we obtain a palindrome (9099909).

The spelling of 31000104 in words is "thirty-one million, one hundred four", and thus it is an aban number.