2166273344 has 28 divisors (see below), whose sum is σ = 4305789204. Its totient is φ = 1081350144.

The previous prime is 2166273337. The next prime is 2166273371. The reversal of 2166273344 is 4433726612.

It can be written as a sum of positive squares in 2 ways, for example, as 510760000 + 1655513344 = 22600^2 + 40688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2166273298 and 2166273307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11624 + ... + 66840.

Almost surely, 2^2166273344 is an apocalyptic number.

It is an amenable number.

2166273344 is a deficient number, since it is larger than the sum of its proper divisors (2139515860).

2166273344 is an equidigital number, since it uses as much as digits as its factorization.

2166273344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55842 (or 55832 counting only the distinct ones).

The product of its digits is 145152, while the sum is 38.

The square root of 2166273344 is about 46543.2416576241. The cubic root of 2166273344 is about 1293.9110405493.

Adding to 2166273344 its reverse (4433726612), we get a palindrome (6599999956).

The spelling of 2166273344 in words is "two billion, one hundred sixty-six million, two hundred seventy-three thousand, three hundred forty-four".