31130869 has 16 divisors (see below), whose sum is σ = 38941056. Its totient is φ = 24177600.

The previous prime is 31130863. The next prime is 31130887. The reversal of 31130869 is 96803113.

It is a cyclic number.

It is not a de Polignac number, because 31130869 - 2³ = 31130861 is a prime.

It is a super-2 number, since 2×31130869² = 1938262009390322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31130869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130861) 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, 35059 + ... + 35935.

It is an arithmetic number, because the mean of its divisors is an integer number (2433816).

Almost surely, 2^31130869 is an apocalyptic number.

It is an amenable number.

31130869 is a deficient number, since it is larger than the sum of its proper divisors (7810187).

31130869 is a wasteful number, since it uses less digits than its factorization.

31130869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 31130869 is about 5579.5043686693. The cubic root of 31130869 is about 314.5794976985.

The spelling of 31130869 in words is "thirty-one million, one hundred thirty thousand, eight hundred sixty-nine".