31139035 has 16 divisors (see below), whose sum is σ = 39075840. Its totient is φ = 23793120.

The previous prime is 31139029. The next prime is 31139039. The reversal of 31139035 is 53093113.

It is not a de Polignac number, because 31139035 - 2⁷ = 31138907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31139039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10974 + ... + 13516.

It is an arithmetic number, because the mean of its divisors is an integer number (2442240).

Almost surely, 2^31139035 is an apocalyptic number.

31139035 is a deficient number, since it is larger than the sum of its proper divisors (7936805).

31139035 is a wasteful number, since it uses less digits than its factorization.

31139035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 31139035 is about 5580.2361061159. The cubic root of 31139035 is about 314.6070012844.

The spelling of 31139035 in words is "thirty-one million, one hundred thirty-nine thousand, thirty-five".