2159391825 has 24 divisors (see below), whose sum is σ = 3966884000. Its totient is φ = 1151675280.

The previous prime is 2159391803. The next prime is 2159391841. The reversal of 2159391825 is 5281939512.

2159391825 is a `hidden beast` number, since 21 + 593 + 9 + 18 + 25 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2159391825 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1598875 + ... + 1600224.

Almost surely, 2^2159391825 is an apocalyptic number.

2159391825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2159391825 is a deficient number, since it is larger than the sum of its proper divisors (1807492175).

2159391825 is a wasteful number, since it uses less digits than its factorization.

2159391825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199118 (or 3199107 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 2159391825 is about 46469.2567726233. The cubic root of 2159391825 is about 1292.5394810273.

The spelling of 2159391825 in words is "two billion, one hundred fifty-nine million, three hundred ninety-one thousand, eight hundred twenty-five".