31132231102331 has 4 divisors (see below), whose sum is σ = 31189145602152. Its totient is φ = 31075316602512.

The previous prime is 31132231102307. The next prime is 31132231102373. The reversal of 31132231102331 is 13320113223113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31132231102331 is a prime.

It is a super-2 number, since 2×31132231102331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31132231102331.

It is not an unprimeable number, because it can be changed into a prime (31132231102381) 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, 28457249090 + ... + 28457250183.

It is an arithmetic number, because the mean of its divisors is an integer number (7797286400538).

Almost surely, 2^{31132231102331} is an apocalyptic number.

31132231102331 is a deficient number, since it is larger than the sum of its proper divisors (56914499821).

31132231102331 is an equidigital number, since it uses as much as digits as its factorization.

31132231102331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56914499820.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31132231102331 its reverse (13320113223113), we get a palindrome (44452344325444).

The spelling of 31132231102331 in words is "thirty-one trillion, one hundred thirty-two billion, two hundred thirty-one million, one hundred two thousand, three hundred thirty-one".