21562275421559 has 2 divisors, whose sum is σ = 21562275421560. Its totient is φ = 21562275421558.

The previous prime is 21562275421499. The next prime is 21562275421663. The reversal of 21562275421559 is 95512457226512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21562275421559 - 2³⁶ = 21493555944823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21562275451559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10781137710779 + 10781137710780.

It is an arithmetic number, because the mean of its divisors is an integer number (10781137710780).

Almost surely, 2^{21562275421559} is an apocalyptic number.

21562275421559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21562275421559 is an equidigital number, since it uses as much as digits as its factorization.

21562275421559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120000, while the sum is 56.

The spelling of 21562275421559 in words is "twenty-one trillion, five hundred sixty-two billion, two hundred seventy-five million, four hundred twenty-one thousand, five hundred fifty-nine".