22213221509 has 2 divisors, whose sum is σ = 22213221510. Its totient is φ = 22213221508.

The previous prime is 22213221491. The next prime is 22213221533. The reversal of 22213221509 is 90512231222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20998908100 + 1214313409 = 144910^2 + 34847^2 .

It is a cyclic number.

It is not a de Polignac number, because 22213221509 - 2²⁸ = 21944786053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22213221559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106610754 + 11106610755.

It is an arithmetic number, because the mean of its divisors is an integer number (11106610755).

Almost surely, 2^22213221509 is an apocalyptic number.

It is an amenable number.

22213221509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22213221509 is an equidigital number, since it uses as much as digits as its factorization.

22213221509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 22213221509 in words is "twenty-two billion, two hundred thirteen million, two hundred twenty-one thousand, five hundred nine".