22400173321 has 2 divisors, whose sum is σ = 22400173322. Its totient is φ = 22400173320.

The previous prime is 22400173273. The next prime is 22400173357. The reversal of 22400173321 is 12337100422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11576684025 + 10823489296 = 107595^2 + 104036^2 .

It is a cyclic number.

It is not a de Polignac number, because 22400173321 - 2¹⁹ = 22399649033 is a prime.

It is not a weakly prime, because it can be changed into another prime (22400173021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11200086660 + 11200086661.

It is an arithmetic number, because the mean of its divisors is an integer number (11200086661).

Almost surely, 2^22400173321 is an apocalyptic number.

It is an amenable number.

22400173321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22400173321 is an equidigital number, since it uses as much as digits as its factorization.

22400173321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 22400173321 its reverse (12337100422), we get a palindrome (34737273743).

The spelling of 22400173321 in words is "twenty-two billion, four hundred million, one hundred seventy-three thousand, three hundred twenty-one".