22719013 has 2 divisors, whose sum is σ = 22719014. Its totient is φ = 22719012.

The previous prime is 22718959. The next prime is 22719091. The reversal of 22719013 is 31091722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20958084 + 1760929 = 4578^2 + 1327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22719013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22719113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11359506 + 11359507.

It is an arithmetic number, because the mean of its divisors is an integer number (11359507).

Almost surely, 2^22719013 is an apocalyptic number.

It is an amenable number.

22719013 is a deficient number, since it is larger than the sum of its proper divisors (1).

22719013 is an equidigital number, since it uses as much as digits as its factorization.

22719013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 22719013 is about 4766.4465800007. The cubic root of 22719013 is about 283.2238486638.

The spelling of 22719013 in words is "twenty-two million, seven hundred nineteen thousand, thirteen".