31139194 has 16 divisors (see below), whose sum is σ = 49050432. Its totient is φ = 14797728.

The previous prime is 31139177. The next prime is 31139201. The reversal of 31139194 is 49193113.

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, 5422 + ... + 9574.

It is an arithmetic number, because the mean of its divisors is an integer number (3065652).

Almost surely, 2^31139194 is an apocalyptic number.

31139194 is a deficient number, since it is larger than the sum of its proper divisors (17911238).

31139194 is a wasteful number, since it uses less digits than its factorization.

31139194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4341.

The product of its digits is 2916, while the sum is 31.

The square root of 31139194 is about 5580.2503528068. The cubic root of 31139194 is about 314.6075367584.

The spelling of 31139194 in words is "thirty-one million, one hundred thirty-nine thousand, one hundred ninety-four".