21522531383 has 2 divisors, whose sum is σ = 21522531384. Its totient is φ = 21522531382.

The previous prime is 21522531367. The next prime is 21522531413. The reversal of 21522531383 is 38313522512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21522531383 - 2⁴ = 21522531367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21522531323) 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, 10761265691 + 10761265692.

It is an arithmetic number, because the mean of its divisors is an integer number (10761265692).

Almost surely, 2^21522531383 is an apocalyptic number.

21522531383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522531383 is an equidigital number, since it uses as much as digits as its factorization.

21522531383 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 21522531383 in words is "twenty-one billion, five hundred twenty-two million, five hundred thirty-one thousand, three hundred eighty-three".