31330311230131 has 4 divisors (see below), whose sum is σ = 31330419541200. Its totient is φ = 31330202919064.

The previous prime is 31330311230117. The next prime is 31330311230143. The reversal of 31330311230131 is 13103211303313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31330311230131 - 2⁷ = 31330311230003 is a prime.

It is a super-2 number, since 2×31330311230131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31330311230096 and 31330311230105.

It is not an unprimeable number, because it can be changed into a prime (31330311230161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53720476 + ... + 54300553.

It is an arithmetic number, because the mean of its divisors is an integer number (7832604885300).

Almost surely, 2^{31330311230131} is an apocalyptic number.

31330311230131 is a deficient number, since it is larger than the sum of its proper divisors (108311069).

31330311230131 is a wasteful number, since it uses less digits than its factorization.

31330311230131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108311068.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31330311230131 its reverse (13103211303313), we get a palindrome (44433522533444).

The spelling of 31330311230131 in words is "thirty-one trillion, three hundred thirty billion, three hundred eleven million, two hundred thirty thousand, one hundred thirty-one".