31199168 has 112 divisors (see below), whose sum is σ = 83295744. Its totient is φ = 11197440.

The previous prime is 31199143. The next prime is 31199173. The reversal of 31199168 is 86199113.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63821 + ... + 64307.

It is an arithmetic number, because the mean of its divisors is an integer number (743712).

Almost surely, 2^31199168 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 31199168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41647872).

31199168 is an abundant number, since it is smaller than the sum of its proper divisors (52096576).

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

31199168 is a wasteful number, since it uses less digits than its factorization.

31199168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 520 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 31199168 is about 5585.6215410642. The cubic root of 31199168 is about 314.8093849709.

Subtracting 31199168 from its reverse (86199113), we obtain a palindrome (54999945).

The spelling of 31199168 in words is "thirty-one million, one hundred ninety-nine thousand, one hundred sixty-eight".