21434531255 has 8 divisors (see below), whose sum is σ = 25795140000. Its totient is φ = 17098490016.

The previous prime is 21434531233. The next prime is 21434531263. The reversal of 21434531255 is 55213543412.

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

It is a cyclic number.

It is not a de Polignac number, because 21434531255 - 2⁶ = 21434531191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6139955 + ... + 6143444.

It is an arithmetic number, because the mean of its divisors is an integer number (3224392500).

Almost surely, 2^21434531255 is an apocalyptic number.

21434531255 is a deficient number, since it is larger than the sum of its proper divisors (4360608745).

21434531255 is a wasteful number, since it uses less digits than its factorization.

21434531255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12283753.

The product of its digits is 72000, while the sum is 35.

The spelling of 21434531255 in words is "twenty-one billion, four hundred thirty-four million, five hundred thirty-one thousand, two hundred fifty-five".