22288163621 has 2 divisors, whose sum is σ = 22288163622. Its totient is φ = 22288163620.

The previous prime is 22288163561. The next prime is 22288163671. The reversal of 22288163621 is 12636188222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19905259396 + 2382904225 = 141086^2 + 48815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22288163621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288163671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144081810 + 11144081811.

It is an arithmetic number, because the mean of its divisors is an integer number (11144081811).

Almost surely, 2^22288163621 is an apocalyptic number.

It is an amenable number.

22288163621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288163621 is an equidigital number, since it uses as much as digits as its factorization.

22288163621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The spelling of 22288163621 in words is "twenty-two billion, two hundred eighty-eight million, one hundred sixty-three thousand, six hundred twenty-one".