22431256643 has 2 divisors, whose sum is σ = 22431256644. Its totient is φ = 22431256642.

The previous prime is 22431256619. The next prime is 22431256651. The reversal of 22431256643 is 34665213422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22431256643 - 2¹⁸ = 22430994499 is a prime.

It is a super-2 number, since 2×22431256643² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22431256597 and 22431256606.

It is not a weakly prime, because it can be changed into another prime (22431256663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215628321 + 11215628322.

It is an arithmetic number, because the mean of its divisors is an integer number (11215628322).

Almost surely, 2^22431256643 is an apocalyptic number.

22431256643 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431256643 is an equidigital number, since it uses as much as digits as its factorization.

22431256643 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 22431256643 in words is "twenty-two billion, four hundred thirty-one million, two hundred fifty-six thousand, six hundred forty-three".