31130164 has 12 divisors (see below), whose sum is σ = 58668484. Its totient is φ = 14367744.

The previous prime is 31130161. The next prime is 31130171. The reversal of 31130164 is 46103113.

It can be written as a sum of positive squares in 2 ways, for example, as 8643600 + 22486564 = 2940^2 + 4742^2 .

It is a super-2 number, since 2×31130164² = 1938174221333792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299277 + ... + 299380.

Almost surely, 2^31130164 is an apocalyptic number.

It is an amenable number.

31130164 is a deficient number, since it is larger than the sum of its proper divisors (27538320).

31130164 is a wasteful number, since it uses less digits than its factorization.

31130164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598674 (or 598672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31130164 is about 5579.4411906570. The cubic root of 31130164 is about 314.5771229899.

Adding to 31130164 its reverse (46103113), we get a palindrome (77233277).

The spelling of 31130164 in words is "thirty-one million, one hundred thirty thousand, one hundred sixty-four".