31132312131 has 8 divisors (see below), whose sum is σ = 41877092880. Its totient is φ = 20571203072.

The previous prime is 31132312111. The next prime is 31132312157. The reversal of 31132312131 is 13121323113.

It is a happy number.

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 31132312131 - 2⁹ = 31132311619 is a prime.

It is a super-2 number, since 2×31132312131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31132312098 and 31132312107.

It is not an unprimeable number, because it can be changed into a prime (31132312111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45917526 + ... + 45918203.

It is an arithmetic number, because the mean of its divisors is an integer number (5234636610).

Almost surely, 2^31132312131 is an apocalyptic number.

31132312131 is a deficient number, since it is larger than the sum of its proper divisors (10744780749).

31132312131 is a wasteful number, since it uses less digits than its factorization.

31132312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91835845.

The product of its digits is 324, while the sum is 21.

Adding to 31132312131 its reverse (13121323113), we get a palindrome (44253635244).

The spelling of 31132312131 in words is "thirty-one billion, one hundred thirty-two million, three hundred twelve thousand, one hundred thirty-one".