21775355159 has 2 divisors, whose sum is σ = 21775355160. Its totient is φ = 21775355158.

The previous prime is 21775355113. The next prime is 21775355171. The reversal of 21775355159 is 95155357712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21775355159 - 2¹² = 21775351063 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 (21775355059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10887677579 + 10887677580.

It is an arithmetic number, because the mean of its divisors is an integer number (10887677580).

Almost surely, 2^21775355159 is an apocalyptic number.

21775355159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21775355159 is an equidigital number, since it uses as much as digits as its factorization.

21775355159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653750, while the sum is 50.

The spelling of 21775355159 in words is "twenty-one billion, seven hundred seventy-five million, three hundred fifty-five thousand, one hundred fifty-nine".