22131311309 has 2 divisors, whose sum is σ = 22131311310. Its totient is φ = 22131311308.

The previous prime is 22131311303. The next prime is 22131311317. The reversal of 22131311309 is 90311313122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17342256100 + 4789055209 = 131690^2 + 69203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22131311309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131311303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065655654 + 11065655655.

It is an arithmetic number, because the mean of its divisors is an integer number (11065655655).

Almost surely, 2^22131311309 is an apocalyptic number.

It is an amenable number.

22131311309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131311309 is an equidigital number, since it uses as much as digits as its factorization.

22131311309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 22131311309 in words is "twenty-two billion, one hundred thirty-one million, three hundred eleven thousand, three hundred nine".