22431320031331 has 4 divisors (see below), whose sum is σ = 22431329640000. Its totient is φ = 22431310422664.

The previous prime is 22431320031277. The next prime is 22431320031371. The reversal of 22431320031331 is 13313002313422.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22431320031331 - 2¹⁷ = 22431319900259 is a prime.

It is a super-2 number, since 2×22431320031331² (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 22431320031331.

It is not an unprimeable number, because it can be changed into a prime (22431320031371) 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, 1192545 + ... + 6803293.

It is an arithmetic number, because the mean of its divisors is an integer number (5607832410000).

Almost surely, 2^{22431320031331} is an apocalyptic number.

22431320031331 is a deficient number, since it is larger than the sum of its proper divisors (9608669).

22431320031331 is an equidigital number, since it uses as much as digits as its factorization.

22431320031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608668.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 22431320031331 its reverse (13313002313422), we get a palindrome (35744322344753).

The spelling of 22431320031331 in words is "twenty-two trillion, four hundred thirty-one billion, three hundred twenty million, thirty-one thousand, three hundred thirty-one".