22315604561 has 2 divisors, whose sum is σ = 22315604562. Its totient is φ = 22315604560.

The previous prime is 22315604543. The next prime is 22315604581. The reversal of 22315604561 is 16540651322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18790926400 + 3524678161 = 137080^2 + 59369^2 .

It is a cyclic number.

It is not a de Polignac number, because 22315604561 - 2³⁰ = 21241862737 is a prime.

It is a super-3 number, since 3×22315604561³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22315604581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11157802280 + 11157802281.

It is an arithmetic number, because the mean of its divisors is an integer number (11157802281).

Almost surely, 2^22315604561 is an apocalyptic number.

It is an amenable number.

22315604561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22315604561 is an equidigital number, since it uses as much as digits as its factorization.

22315604561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 22315604561 in words is "twenty-two billion, three hundred fifteen million, six hundred four thousand, five hundred sixty-one".