2155644122225 has 48 divisors (see below), whose sum is σ = 3087843793920. Its totient is φ = 1475370163200.

The previous prime is 2155644122189. The next prime is 2155644122237. The reversal of 2155644122225 is 5222214465512.

It is not a de Polignac number, because 2155644122225 - 2²⁶ = 2155577013361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64633904 + ... + 64667246.

It is an arithmetic number, because the mean of its divisors is an integer number (64330079040).

Almost surely, 2^{2155644122225} is an apocalyptic number.

2155644122225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155644122225 is a deficient number, since it is larger than the sum of its proper divisors (932199671695).

2155644122225 is a wasteful number, since it uses less digits than its factorization.

2155644122225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47210 (or 47205 counting only the distinct ones).

The product of its digits is 384000, while the sum is 41.

Adding to 2155644122225 its reverse (5222214465512), we get a palindrome (7377858587737).

The spelling of 2155644122225 in words is "two trillion, one hundred fifty-five billion, six hundred forty-four million, one hundred twenty-two thousand, two hundred twenty-five".