2144615554221 has 24 divisors (see below), whose sum is σ = 3292014237120. Its totient is φ = 1216549162752.

The previous prime is 2144615554219. The next prime is 2144615554331. The reversal of 2144615554221 is 1224555164412.

It is not a de Polignac number, because 2144615554221 - 2¹ = 2144615554219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144615554021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2326416 + ... + 3114713.

It is an arithmetic number, because the mean of its divisors is an integer number (137167259880).

Almost surely, 2^{2144615554221} is an apocalyptic number.

2144615554221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2144615554221 is a deficient number, since it is larger than the sum of its proper divisors (1147398682899).

2144615554221 is an equidigital number, since it uses as much as digits as its factorization.

2144615554221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441413 (or 5441276 counting only the distinct ones).

The product of its digits is 384000, while the sum is 42.

The spelling of 2144615554221 in words is "two trillion, one hundred forty-four billion, six hundred fifteen million, five hundred fifty-four thousand, two hundred twenty-one".