31003320131 has 12 divisors (see below), whose sum is σ = 37228478400. Its totient is φ = 25717038480.

The previous prime is 31003320119. The next prime is 31003320157. The reversal of 31003320131 is 13102330013.

It is not a de Polignac number, because 31003320131 - 2⁶ = 31003320067 is a prime.

It is a super-2 number, since 2×31003320131² (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 (31003320331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10203656 + ... + 10206693.

It is an arithmetic number, because the mean of its divisors is an integer number (3102373200).

Almost surely, 2^31003320131 is an apocalyptic number.

31003320131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31003320131 is a deficient number, since it is larger than the sum of its proper divisors (6225158269).

31003320131 is a wasteful number, since it uses less digits than its factorization.

31003320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20410394 (or 20410387 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31003320131 its reverse (13102330013), we get a palindrome (44105650144).

The spelling of 31003320131 in words is "thirty-one billion, three million, three hundred twenty thousand, one hundred thirty-one".