2165502145 has 32 divisors (see below), whose sum is σ = 2752219008. Its totient is φ = 1633540608.

The previous prime is 2165502137. The next prime is 2165502161. The reversal of 2165502145 is 5412055612.

It is a cyclic number.

It is not a de Polignac number, because 2165502145 - 2³ = 2165502137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1088842 + ... + 1090828.

It is an arithmetic number, because the mean of its divisors is an integer number (86006844).

Almost surely, 2^2165502145 is an apocalyptic number.

It is an amenable number.

2165502145 is a deficient number, since it is larger than the sum of its proper divisors (586716863).

2165502145 is a wasteful number, since it uses less digits than its factorization.

2165502145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2165502145 is about 46534.9561620079. The cubic root of 2165502145 is about 1293.7574770819.

Adding to 2165502145 its reverse (5412055612), we get a palindrome (7577557757).

The spelling of 2165502145 in words is "two billion, one hundred sixty-five million, five hundred two thousand, one hundred forty-five".