2158435825 has 48 divisors (see below), whose sum is σ = 3307288320. Its totient is φ = 1360753920.

The previous prime is 2158435817. The next prime is 2158435837. The reversal of 2158435825 is 5285348512.

It is not a de Polignac number, because 2158435825 - 2³ = 2158435817 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 610212 + ... + 613738.

It is an arithmetic number, because the mean of its divisors is an integer number (68901840).

Almost surely, 2^2158435825 is an apocalyptic number.

2158435825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2158435825 is a deficient number, since it is larger than the sum of its proper divisors (1148852495).

2158435825 is a wasteful number, since it uses less digits than its factorization.

2158435825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826 (or 3821 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The square root of 2158435825 is about 46458.9692632112. The cubic root of 2158435825 is about 1292.3487096992.

The spelling of 2158435825 in words is "two billion, one hundred fifty-eight million, four hundred thirty-five thousand, eight hundred twenty-five".