31139002 has 16 divisors (see below), whose sum is σ = 49717800. Its totient is φ = 14576128.

The previous prime is 31138997. The next prime is 31139021. The reversal of 31139002 is 20093113.

It can be written as a sum of positive squares in 4 ways, for example, as 26512201 + 4626801 = 5149^2 + 2151^2 .

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, 4374 + ... + 9022.

Almost surely, 2^31139002 is an apocalyptic number.

31139002 is a deficient number, since it is larger than the sum of its proper divisors (18578798).

31139002 is a wasteful number, since it uses less digits than its factorization.

31139002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4865.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 31139002 is about 5580.2331492510. The cubic root of 31139002 is about 314.6068901481.

The spelling of 31139002 in words is "thirty-one million, one hundred thirty-nine thousand, two".