31049139 has 16 divisors (see below), whose sum is σ = 46214784. Its totient is φ = 18379200.

The previous prime is 31049119. The next prime is 31049159. The reversal of 31049139 is 93194013.

It is an interprime number because it is at equal distance from previous prime (31049119) and next prime (31049159).

It is not a de Polignac number, because 31049139 - 2⁵ = 31049107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31049119) 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, 9522 + ... + 12359.

It is an arithmetic number, because the mean of its divisors is an integer number (2888424).

Almost surely, 2^31049139 is an apocalyptic number.

31049139 is a deficient number, since it is larger than the sum of its proper divisors (15165645).

31049139 is a wasteful number, since it uses less digits than its factorization.

31049139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21938.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 31049139 is about 5572.1754279635. The cubic root of 31049139 is about 314.3039607372.

The spelling of 31049139 in words is "thirty-one million, forty-nine thousand, one hundred thirty-nine".