2255217858 has 72 divisors (see below), whose sum is σ = 5331385332. Its totient is φ = 688338432.

The previous prime is 2255217823. The next prime is 2255217859. The reversal of 2255217858 is 8587125522.

2255217858 is a `hidden beast` number, since 2 + 2 + 5 + 521 + 78 + 58 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1488647889 + 766569969 = 38583^2 + 27687^2 .

It is not an unprimeable number, because it can be changed into a prime (2255217859) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 186616 + ... + 198332.

Almost surely, 2^2255217858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2255217858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2665692666).

2255217858 is an abundant number, since it is smaller than the sum of its proper divisors (3076167474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2255217858 is a wasteful number, since it uses less digits than its factorization.

2255217858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11796 (or 11776 counting only the distinct ones).

The product of its digits is 448000, while the sum is 45.

The square root of 2255217858 is about 47489.1341045507. The cubic root of 2255217858 is about 1311.3828526096.

The spelling of 2255217858 in words is "two billion, two hundred fifty-five million, two hundred seventeen thousand, eight hundred fifty-eight".