2156944307 has 4 divisors (see below), whose sum is σ = 2465079216. Its totient is φ = 1848809400.

The previous prime is 2156944253. The next prime is 2156944337. The reversal of 2156944307 is 7034496512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2156944307 - 2¹⁴ = 2156927923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156944337) 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 3 ways as a sum of consecutive naturals, for example, 154067444 + ... + 154067457.

It is an arithmetic number, because the mean of its divisors is an integer number (616269804).

Almost surely, 2^2156944307 is an apocalyptic number.

2156944307 is a deficient number, since it is larger than the sum of its proper divisors (308134909).

2156944307 is an equidigital number, since it uses as much as digits as its factorization.

2156944307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308134908.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 2156944307 is about 46442.9144972621. The cubic root of 2156944307 is about 1292.0509623669.

The spelling of 2156944307 in words is "two billion, one hundred fifty-six million, nine hundred forty-four thousand, three hundred seven".