31313231131 has 16 divisors (see below), whose sum is σ = 38590763008. Its totient is φ = 24742260000.

The previous prime is 31313231119. The next prime is 31313231149. The reversal of 31313231131 is 13113231313.

It is a cyclic number.

It is not a de Polignac number, because 31313231131 - 2²¹ = 31311133979 is a prime.

It is a super-2 number, since 2×31313231131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31313231531) 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, 160755 + ... + 297436.

It is an arithmetic number, because the mean of its divisors is an integer number (2411922688).

Almost surely, 2^31313231131 is an apocalyptic number.

31313231131 is a deficient number, since it is larger than the sum of its proper divisors (7277531877).

31313231131 is a wasteful number, since it uses less digits than its factorization.

31313231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458962.

The product of its digits is 486, while the sum is 22.

Adding to 31313231131 its reverse (13113231313), we get a palindrome (44426462444).

The spelling of 31313231131 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-one".