2102165025 has 24 divisors (see below), whose sum is σ = 3587698944. Its totient is φ = 1084987200.

The previous prime is 2102164969. The next prime is 2102165047. The reversal of 2102165025 is 5205612012.

It is a happy number.

It is not a de Polignac number, because 2102165025 - 2¹⁵ = 2102132257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102164986 and 2102165004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449754 + ... + 454403.

It is an arithmetic number, because the mean of its divisors is an integer number (149487456).

Almost surely, 2^2102165025 is an apocalyptic number.

2102165025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2102165025 is a deficient number, since it is larger than the sum of its proper divisors (1485533919).

2102165025 is a wasteful number, since it uses less digits than its factorization.

2102165025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904201 (or 904196 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2102165025 is about 45849.3732236331. The cubic root of 2102165025 is about 1281.0190909675.

Adding to 2102165025 its reverse (5205612012), we get a palindrome (7307777037).

The spelling of 2102165025 in words is "two billion, one hundred two million, one hundred sixty-five thousand, twenty-five".