22431355321 has 2 divisors, whose sum is σ = 22431355322. Its totient is φ = 22431355320.

The previous prime is 22431355259. The next prime is 22431355333. The reversal of 22431355321 is 12355313422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15860631721 + 6570723600 = 125939^2 + 81060^2 .

It is a cyclic number.

It is not a de Polignac number, because 22431355321 - 2¹³ = 22431347129 is a prime.

It is not a weakly prime, because it can be changed into another prime (22431355391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215677660 + 11215677661.

It is an arithmetic number, because the mean of its divisors is an integer number (11215677661).

Almost surely, 2^22431355321 is an apocalyptic number.

It is an amenable number.

22431355321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431355321 is an equidigital number, since it uses as much as digits as its factorization.

22431355321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

Adding to 22431355321 its reverse (12355313422), we get a palindrome (34786668743).

The spelling of 22431355321 in words is "twenty-two billion, four hundred thirty-one million, three hundred fifty-five thousand, three hundred twenty-one".