2159110945 has 4 divisors (see below), whose sum is σ = 2590933140. Its totient is φ = 1727288752.

The previous prime is 2159110937. The next prime is 2159110973. The reversal of 2159110945 is 5490119512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 867714849 + 1291396096 = 29457^2 + 35936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2159110945 - 2³ = 2159110937 is a prime.

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, 215911090 + ... + 215911099.

It is an arithmetic number, because the mean of its divisors is an integer number (647733285).

Almost surely, 2^2159110945 is an apocalyptic number.

It is an amenable number.

2159110945 is a deficient number, since it is larger than the sum of its proper divisors (431822195).

2159110945 is an equidigital number, since it uses as much as digits as its factorization.

2159110945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431822194.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 2159110945 is about 46466.2344611655. The cubic root of 2159110945 is about 1292.4834368166.

The spelling of 2159110945 in words is "two billion, one hundred fifty-nine million, one hundred ten thousand, nine hundred forty-five".