31020320131 has 8 divisors (see below), whose sum is σ = 31064468544. Its totient is φ = 30976201920.

The previous prime is 31020320063. The next prime is 31020320153. The reversal of 31020320131 is 13102302013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31020320131 - 2¹¹ = 31020318083 is a prime.

It is a super-2 number, since 2×31020320131² (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 (31020300131) 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 7 ways as a sum of consecutive naturals, for example, 2692375 + ... + 2703871.

It is an arithmetic number, because the mean of its divisors is an integer number (3883058568).

Almost surely, 2^31020320131 is an apocalyptic number.

31020320131 is a deficient number, since it is larger than the sum of its proper divisors (44148413).

31020320131 is a wasteful number, since it uses less digits than its factorization.

31020320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15101.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31020320131 its reverse (13102302013), we get a palindrome (44122622144).

The spelling of 31020320131 in words is "thirty-one billion, twenty million, three hundred twenty thousand, one hundred thirty-one".