31302320132131 has 4 divisors (see below), whose sum is σ = 31322094183072. Its totient is φ = 31282546081192.

The previous prime is 31302320132117. The next prime is 31302320132141. The reversal of 31302320132131 is 13123102320313.

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 31302320132131 - 2¹⁷ = 31302320001059 is a prime.

It is a super-2 number, since 2×31302320132131² (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 = 31302320132096 and 31302320132105.

It is not an unprimeable number, because it can be changed into a prime (31302320132141) 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, 9887023096 + ... + 9887026261.

It is an arithmetic number, because the mean of its divisors is an integer number (7830523545768).

Almost surely, 2^{31302320132131} is an apocalyptic number.

31302320132131 is a deficient number, since it is larger than the sum of its proper divisors (19774050941).

31302320132131 is a wasteful number, since it uses less digits than its factorization.

31302320132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19774050940.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31302320132131 its reverse (13123102320313), we get a palindrome (44425422452444).

The spelling of 31302320132131 in words is "thirty-one trillion, three hundred two billion, three hundred twenty million, one hundred thirty-two thousand, one hundred thirty-one".