2156445244 has 24 divisors (see below), whose sum is σ = 3829100688. Its totient is φ = 1062483840.

The previous prime is 2156445241. The next prime is 2156445251. The reversal of 2156445244 is 4425446512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156445241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123624 + ... + 139984.

It is an arithmetic number, because the mean of its divisors is an integer number (159545862).

Almost surely, 2^2156445244 is an apocalyptic number.

It is an amenable number.

2156445244 is a deficient number, since it is larger than the sum of its proper divisors (1672655444).

2156445244 is a wasteful number, since it uses less digits than its factorization.

2156445244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16845 (or 16843 counting only the distinct ones).

The product of its digits is 153600, while the sum is 37.

The square root of 2156445244 is about 46437.5413216505. The cubic root of 2156445244 is about 1291.9513052478.

It can be divided in two parts, 215644524 and 4, that added together give a triangular number (215644528 = T₂₀₇₆₇).

The spelling of 2156445244 in words is "two billion, one hundred fifty-six million, four hundred forty-five thousand, two hundred forty-four".