31311196 has 36 divisors (see below), whose sum is σ = 64379448. Its totient is φ = 13284768.

The previous prime is 31311191. The next prime is 31311197. The reversal of 31311196 is 69111313.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31311196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20226 + ... + 21718.

It is an arithmetic number, because the mean of its divisors is an integer number (1788318).

Almost surely, 2^31311196 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 31311196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32189724).

31311196 is an abundant number, since it is smaller than the sum of its proper divisors (33068252).

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

31311196 is a wasteful number, since it uses less digits than its factorization.

31311196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1609 counting only the distinct ones).

The product of its digits is 486, while the sum is 25.

The square root of 31311196 is about 5595.6408033397. The cubic root of 31311196 is about 315.1857340851.

The spelling of 31311196 in words is "thirty-one million, three hundred eleven thousand, one hundred ninety-six".