2165003623 has 4 divisors (see below), whose sum is σ = 2191088088. Its totient is φ = 2138919160.

The previous prime is 2165003609. The next prime is 2165003657. The reversal of 2165003623 is 3263005612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165003623 is a prime.

It is a super-2 number, since 2×2165003623² = 9374481375206252258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165003591 and 2165003600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165003123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13042108 + ... + 13042273.

It is an arithmetic number, because the mean of its divisors is an integer number (547772022).

Almost surely, 2^2165003623 is an apocalyptic number.

2165003623 is a deficient number, since it is larger than the sum of its proper divisors (26084465).

2165003623 is an equidigital number, since it uses as much as digits as its factorization.

2165003623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26084464.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 2165003623 is about 46529.5994287507. The cubic root of 2165003623 is about 1293.6581904775.

The spelling of 2165003623 in words is "two billion, one hundred sixty-five million, three thousand, six hundred twenty-three".