2159597265 has 64 divisors (see below), whose sum is σ = 4023545856. Its totient is φ = 968723712.

The previous prime is 2159597257. The next prime is 2159597287. The reversal of 2159597265 is 5627959512.

It is a happy number.

It is not a de Polignac number, because 2159597265 - 2³ = 2159597257 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2623644 + ... + 2624466.

It is an arithmetic number, because the mean of its divisors is an integer number (62867904).

Almost surely, 2^2159597265 is an apocalyptic number.

It is an amenable number.

2159597265 is a deficient number, since it is larger than the sum of its proper divisors (1863948591).

2159597265 is a wasteful number, since it uses less digits than its factorization.

2159597265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its digits is 1701000, while the sum is 51.

The square root of 2159597265 is about 46471.4672137646. The cubic root of 2159597265 is about 1292.5804695574.

The spelling of 2159597265 in words is "two billion, one hundred fifty-nine million, five hundred ninety-seven thousand, two hundred sixty-five".