21022552255 has 16 divisors (see below), whose sum is σ = 26539293600. Its totient is φ = 15962880640.

The previous prime is 21022552249. The next prime is 21022552273. The reversal of 21022552255 is 55225522012.

It is not a de Polignac number, because 21022552255 - 2¹⁷ = 21022421183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1220116 + ... + 1237225.

It is an arithmetic number, because the mean of its divisors is an integer number (1658705850).

Almost surely, 2^21022552255 is an apocalyptic number.

21022552255 is a deficient number, since it is larger than the sum of its proper divisors (5516741345).

21022552255 is a wasteful number, since it uses less digits than its factorization.

21022552255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457434.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 21022552255 in words is "twenty-one billion, twenty-two million, five hundred fifty-two thousand, two hundred fifty-five".