22251236309 has 2 divisors, whose sum is σ = 22251236310. Its totient is φ = 22251236308.

The previous prime is 22251236303. The next prime is 22251236339. The reversal of 22251236309 is 90363215222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20751843025 + 1499393284 = 144055^2 + 38722^2 .

It is a cyclic number.

It is not a de Polignac number, because 22251236309 - 2³² = 17956269013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22251236303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11125618154 + 11125618155.

It is an arithmetic number, because the mean of its divisors is an integer number (11125618155).

Almost surely, 2^22251236309 is an apocalyptic number.

It is an amenable number.

22251236309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22251236309 is an equidigital number, since it uses as much as digits as its factorization.

22251236309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 22251236309 in words is "twenty-two billion, two hundred fifty-one million, two hundred thirty-six thousand, three hundred nine".