2165962825 has 12 divisors (see below), whose sum is σ = 2892393868. Its totient is φ = 1599480000.

The previous prime is 2165962811. The next prime is 2165962853. The reversal of 2165962825 is 5282695612.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 468852409 + 1697110416 = 21653^2 + 41196^2 .

It is not a de Polignac number, because 2165962825 - 2⁷ = 2165962697 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 3331926 + ... + 3332575.

Almost surely, 2^2165962825 is an apocalyptic number.

2165962825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2165962825 is a deficient number, since it is larger than the sum of its proper divisors (726431043).

2165962825 is a wasteful number, since it uses less digits than its factorization.

2165962825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664524 (or 6664519 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The square root of 2165962825 is about 46539.9057261615. The cubic root of 2165962825 is about 1293.8492134546.

The spelling of 2165962825 in words is "two billion, one hundred sixty-five million, nine hundred sixty-two thousand, eight hundred twenty-five".