31150022213131 has 4 divisors (see below), whose sum is σ = 31228485745552. Its totient is φ = 31071558680712.

The previous prime is 31150022213083. The next prime is 31150022213153. The reversal of 31150022213131 is 13131222005113.

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 31150022213131 - 2⁷ = 31150022213003 is a prime.

It is a super-3 number, since 3×31150022213131³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31150022213096 and 31150022213105.

It is not an unprimeable number, because it can be changed into a prime (31150022213231) 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, 39231765615 + ... + 39231766408.

It is an arithmetic number, because the mean of its divisors is an integer number (7807121436388).

Almost surely, 2^{31150022213131} is an apocalyptic number.

31150022213131 is a deficient number, since it is larger than the sum of its proper divisors (78463532421).

31150022213131 is an equidigital number, since it uses as much as digits as its factorization.

31150022213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78463532420.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 31150022213131 its reverse (13131222005113), we get a palindrome (44281244218244).

The spelling of 31150022213131 in words is "thirty-one trillion, one hundred fifty billion, twenty-two million, two hundred thirteen thousand, one hundred thirty-one".