22643256431 has 2 divisors, whose sum is σ = 22643256432. Its totient is φ = 22643256430.

The previous prime is 22643256359. The next prime is 22643256439. The reversal of 22643256431 is 13465234622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22643256431 - 2¹⁴ = 22643240047 is a prime.

It is a super-2 number, since 2×22643256431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22643256439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11321628215 + 11321628216.

It is an arithmetic number, because the mean of its divisors is an integer number (11321628216).

Almost surely, 2^22643256431 is an apocalyptic number.

22643256431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22643256431 is an equidigital number, since it uses as much as digits as its factorization.

22643256431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 38.

The spelling of 22643256431 in words is "twenty-two billion, six hundred forty-three million, two hundred fifty-six thousand, four hundred thirty-one".