21825248255 has 8 divisors (see below), whose sum is σ = 26619647424. Its totient is φ = 17173965600.

The previous prime is 21825248233. The next prime is 21825248257. The reversal of 21825248255 is 55284252812.

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 21825248255 - 2⁸ = 21825247999 is a prime.

It is a super-2 number, since 2×21825248255² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21825248257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35778791 + ... + 35779400.

It is an arithmetic number, because the mean of its divisors is an integer number (3327455928).

Almost surely, 2^21825248255 is an apocalyptic number.

21825248255 is a deficient number, since it is larger than the sum of its proper divisors (4794399169).

21825248255 is an equidigital number, since it uses as much as digits as its factorization.

21825248255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71558257.

The product of its digits is 512000, while the sum is 44.

The spelling of 21825248255 in words is "twenty-one billion, eight hundred twenty-five million, two hundred forty-eight thousand, two hundred fifty-five".