225611552166 has 256 divisors, whose sum is σ = 624599119872. Its totient is φ = 52428902400.

The previous prime is 225611552147. The next prime is 225611552171. The reversal of 225611552166 is 661255116522.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 62442576 + ... + 62446188.

It is an arithmetic number, because the mean of its divisors is an integer number (2439840312).

Almost surely, 2^225611552166 is an apocalyptic number.

225611552166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 225611552166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312299559936).

225611552166 is an abundant number, since it is smaller than the sum of its proper divisors (398987567706).

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

225611552166 is a wasteful number, since it uses less digits than its factorization.

225611552166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

The product of its digits is 216000, while the sum is 42.

Adding to 225611552166 its reverse (661255116522), we get a palindrome (886866668688).

It can be divided in two parts, 225611 and 552166, that added together give a palindrome (777777).

The spelling of 225611552166 in words is "two hundred twenty-five billion, six hundred eleven million, five hundred fifty-two thousand, one hundred sixty-six".