21227528275 has 6 divisors (see below), whose sum is σ = 26322135092. Its totient is φ = 16982022600.

The previous prime is 21227528183. The next prime is 21227528321. The reversal of 21227528275 is 57282572212.

It is not a de Polignac number, because 21227528275 - 2²⁷ = 21093310547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424550541 + ... + 424550590.

Almost surely, 2^21227528275 is an apocalyptic number.

21227528275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21227528275 is a deficient number, since it is larger than the sum of its proper divisors (5094606817).

21227528275 is an equidigital number, since it uses as much as digits as its factorization.

21227528275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849101141 (or 849101136 counting only the distinct ones).

The product of its digits is 313600, while the sum is 43.

The spelling of 21227528275 in words is "twenty-one billion, two hundred twenty-seven million, five hundred twenty-eight thousand, two hundred seventy-five".