21255150255 has 8 divisors (see below), whose sum is σ = 34008240432. Its totient is φ = 11336080128.

The previous prime is 21255150253. The next prime is 21255150281. The reversal of 21255150255 is 55205155212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21255150255 - 2¹ = 21255150253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21255150253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708504994 + ... + 708505023.

It is an arithmetic number, because the mean of its divisors is an integer number (4251030054).

Almost surely, 2^21255150255 is an apocalyptic number.

21255150255 is a deficient number, since it is larger than the sum of its proper divisors (12753090177).

21255150255 is a wasteful number, since it uses less digits than its factorization.

21255150255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417010025.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 21255150255 in words is "twenty-one billion, two hundred fifty-five million, one hundred fifty thousand, two hundred fifty-five".