2100165 has 16 divisors (see below), whose sum is σ = 3537600. Its totient is φ = 1060992.

The previous prime is 2100121. The next prime is 2100167. The reversal of 2100165 is 5610012.

It is a de Polignac number, because none of the positive numbers 2^k-2100165 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3400 + ... + 3969.

It is an arithmetic number, because the mean of its divisors is an integer number (221100).

2^2100165 is an apocalyptic number.

It is an amenable number.

2100165 is a deficient number, since it is larger than the sum of its proper divisors (1437435).

2100165 is a wasteful number, since it uses less digits than its factorization.

2100165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 2100165 is about 1449.1946039094. The cubic root of 2100165 is about 128.0612703087.

Adding to 2100165 its product of nonzero digits (60), we get a triangular number (2100225 = T₂₀₄₉).

Adding to 2100165 its reverse (5610012), we get a palindrome (7710177).

The spelling of 2100165 in words is "two million, one hundred thousand, one hundred sixty-five".