31669131 has 16 divisors (see below), whose sum is σ = 47043360. Its totient is φ = 18816000.

The previous prime is 31669103. The next prime is 31669139. The reversal of 31669131 is 13196613.

It is not a de Polignac number, because 31669131 - 2¹⁰ = 31668107 is a prime.

It is a super-2 number, since 2×31669131² = 2005867716590322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31669139) 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, 12870 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (2940210).

Almost surely, 2^31669131 is an apocalyptic number.

31669131 is a deficient number, since it is larger than the sum of its proper divisors (15374229).

31669131 is a wasteful number, since it uses less digits than its factorization.

31669131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28046.

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

The square root of 31669131 is about 5627.5332962142. The cubic root of 31669131 is about 316.3822052406.

The spelling of 31669131 in words is "thirty-one million, six hundred sixty-nine thousand, one hundred thirty-one".