31313196 has 24 divisors (see below), whose sum is σ = 81182640. Its totient is φ = 10437696.

The previous prime is 31313147. The next prime is 31313207. The reversal of 31313196 is 69131313.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

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, 144861 + ... + 145076.

It is an arithmetic number, because the mean of its divisors is an integer number (3382610).

Almost surely, 2^31313196 is an apocalyptic number.

31313196 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31313196 is an abundant number, since it is smaller than the sum of its proper divisors (49869444).

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

31313196 is a wasteful number, since it uses less digits than its factorization.

31313196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289950 (or 289942 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 31313196 is about 5595.8195110279. The cubic root of 31313196 is about 315.1924447629.

The spelling of 31313196 in words is "thirty-one million, three hundred thirteen thousand, one hundred ninety-six".