2255984621 has 6 divisors (see below), whose sum is σ = 2479718766. Its totient is φ = 2050895000.

The previous prime is 2255984603. The next prime is 2255984623. The reversal of 2255984621 is 1264895522.

It can be written as a sum of positive squares in only one way, i.e., 2201017225 + 54967396 = 46915^2 + 7414^2 .

It is not a de Polignac number, because 2255984621 - 2⁶ = 2255984557 is a prime.

It is a super-2 number, since 2×2255984621² = 10178933220377027282, which 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 (2255984623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9322130 + ... + 9322371.

It is an arithmetic number, because the mean of its divisors is an integer number (413286461).

Almost surely, 2^2255984621 is an apocalyptic number.

It is an amenable number.

2255984621 is a deficient number, since it is larger than the sum of its proper divisors (223734145).

2255984621 is a wasteful number, since it uses less digits than its factorization.

2255984621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18644523 (or 18644512 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 2255984621 is about 47497.2064546958. The cubic root of 2255984621 is about 1311.5314570132.

The spelling of 2255984621 in words is "two billion, two hundred fifty-five million, nine hundred eighty-four thousand, six hundred twenty-one".