225555555522 has 128 divisors (see below), whose sum is σ = 517871149056. Its totient is φ = 64878360000.

The previous prime is 225555555517. The next prime is 225555555527.

225555555522 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (225555555517) and next prime (225555555527).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (225555555527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2107995793 + ... + 2107995899.

It is an arithmetic number, because the mean of its divisors is an integer number (4045868352).

Almost surely, 2^225555555522 is an apocalyptic number.

225555555522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 225555555522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258935574528).

225555555522 is an abundant number, since it is smaller than the sum of its proper divisors (292315593534).

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

225555555522 is a wasteful number, since it uses less digits than its factorization.

225555555522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 255 counting only the distinct ones).

The product of its digits is 6250000, while the sum is 48.

The spelling of 225555555522 in words is "two hundred twenty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred twenty-two".