22721536077533 has 2 divisors, whose sum is σ = 22721536077534. Its totient is φ = 22721536077532.

The previous prime is 22721536077419. The next prime is 22721536077629. The reversal of 22721536077533 is 33577063512722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18150650288164 + 4570885789369 = 4260358^2 + 2137963^2 .

It is a cyclic number.

It is not a de Polignac number, because 22721536077533 - 2⁸ = 22721536077277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22721536077133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11360768038766 + 11360768038767.

It is an arithmetic number, because the mean of its divisors is an integer number (11360768038767).

Almost surely, 2^{22721536077533} is an apocalyptic number.

It is an amenable number.

22721536077533 is a deficient number, since it is larger than the sum of its proper divisors (1).

22721536077533 is an equidigital number, since it uses as much as digits as its factorization.

22721536077533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11113200, while the sum is 53.

The spelling of 22721536077533 in words is "twenty-two trillion, seven hundred twenty-one billion, five hundred thirty-six million, seventy-seven thousand, five hundred thirty-three".