31199104 has 32 divisors (see below), whose sum is σ = 63048240. Its totient is φ = 15375360.

The previous prime is 31199089. The next prime is 31199111. The reversal of 31199104 is 40199113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

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, 7372 + ... + 10804.

Almost surely, 2^31199104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31199104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31524120).

31199104 is an abundant number, since it is smaller than the sum of its proper divisors (31849136).

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

31199104 is an equidigital number, since it uses as much as digits as its factorization.

31199104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 31199104 is about 5585.6158120658. The cubic root of 31199104 is about 314.8091697107.

Subtracting 31199104 from its reverse (40199113), we obtain a palindrome (9000009).

The spelling of 31199104 in words is "thirty-one million, one hundred ninety-nine thousand, one hundred four".