2155228512144 has 60 divisors (see below), whose sum is σ = 5663640892176. Its totient is φ = 706233017024.

The previous prime is 2155228512113. The next prime is 2155228512149. The reversal of 2155228512144 is 4412158225512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2155228512096 and 2155228512105.

It is not an unprimeable number, because it can be changed into a prime (2155228512149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6282294 + ... + 6616469.

Almost surely, 2^{2155228512144} is an apocalyptic number.

2155228512144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2155228512144 is an abundant number, since it is smaller than the sum of its proper divisors (3508412380032).

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

2155228512144 is a wasteful number, since it uses less digits than its factorization.

2155228512144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12898892 (or 12898827 counting only the distinct ones).

The product of its digits is 256000, while the sum is 42.

The spelling of 2155228512144 in words is "two trillion, one hundred fifty-five billion, two hundred twenty-eight million, five hundred twelve thousand, one hundred forty-four".