22715415421 has 2 divisors, whose sum is σ = 22715415422. Its totient is φ = 22715415420.

The previous prime is 22715415409. The next prime is 22715415449. The reversal of 22715415421 is 12451451722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16903640196 + 5811775225 = 130014^2 + 76235^2 .

It is a cyclic number.

It is not a de Polignac number, because 22715415421 - 2¹¹ = 22715413373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22715415221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11357707710 + 11357707711.

It is an arithmetic number, because the mean of its divisors is an integer number (11357707711).

Almost surely, 2^22715415421 is an apocalyptic number.

It is an amenable number.

22715415421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22715415421 is an equidigital number, since it uses as much as digits as its factorization.

22715415421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 34.

The spelling of 22715415421 in words is "twenty-two billion, seven hundred fifteen million, four hundred fifteen thousand, four hundred twenty-one".