21522368275 has 24 divisors (see below), whose sum is σ = 28129362800. Its totient is φ = 16290201600.

The previous prime is 21522368267. The next prime is 21522368279. The reversal of 21522368275 is 57286322512.

It is not a de Polignac number, because 21522368275 - 2³ = 21522368267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21522368279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335815 + ... + 394735.

Almost surely, 2^21522368275 is an apocalyptic number.

21522368275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21522368275 is a deficient number, since it is larger than the sum of its proper divisors (6606994525).

21522368275 is a wasteful number, since it uses less digits than its factorization.

21522368275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59719 (or 59714 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 21522368275 in words is "twenty-one billion, five hundred twenty-two million, three hundred sixty-eight thousand, two hundred seventy-five".