31138853 has 16 divisors (see below), whose sum is σ = 33896640. Its totient is φ = 28512000.

The previous prime is 31138841. The next prime is 31138859. The reversal of 31138853 is 35883113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31138853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31138859) 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, 77453 + ... + 77853.

It is an arithmetic number, because the mean of its divisors is an integer number (2118540).

Almost surely, 2^31138853 is an apocalyptic number.

It is an amenable number.

31138853 is a deficient number, since it is larger than the sum of its proper divisors (2757787).

31138853 is a wasteful number, since it uses less digits than its factorization.

31138853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its digits is 8640, while the sum is 32.

The square root of 31138853 is about 5580.2197985384. The cubic root of 31138853 is about 314.6063883497.

The spelling of 31138853 in words is "thirty-one million, one hundred thirty-eight thousand, eight hundred fifty-three".