22231321949 has 2 divisors, whose sum is σ = 22231321950. Its totient is φ = 22231321948.

The previous prime is 22231321939. The next prime is 22231322023. The reversal of 22231321949 is 94912313222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13860352900 + 8370969049 = 117730^2 + 91493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22231321949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22231321919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115660974 + 11115660975.

It is an arithmetic number, because the mean of its divisors is an integer number (11115660975).

Almost surely, 2^22231321949 is an apocalyptic number.

It is an amenable number.

22231321949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231321949 is an equidigital number, since it uses as much as digits as its factorization.

22231321949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The spelling of 22231321949 in words is "twenty-two billion, two hundred thirty-one million, three hundred twenty-one thousand, nine hundred forty-nine".