31231010131 has 6 divisors (see below), whose sum is σ = 33176194460. Its totient is φ = 29393891616.

The previous prime is 31231010113. The next prime is 31231010137. The reversal of 31231010131 is 13101013213.

It is not a de Polignac number, because 31231010131 - 2⁷ = 31231010003 is a prime.

It is a super-2 number, since 2×31231010131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231010137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54032601 + ... + 54033178.

Almost surely, 2^31231010131 is an apocalyptic number.

31231010131 is a deficient number, since it is larger than the sum of its proper divisors (1945184329).

31231010131 is a wasteful number, since it uses less digits than its factorization.

31231010131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108065813 (or 108065796 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31231010131 its reverse (13101013213), we get a palindrome (44332023344).

The spelling of 31231010131 in words is "thirty-one billion, two hundred thirty-one million, ten thousand, one hundred thirty-one".