2165155365 has 16 divisors (see below), whose sum is σ = 3469569408. Its totient is φ = 1152975936.

The previous prime is 2165155357. The next prime is 2165155373. The reversal of 2165155365 is 5635515612.

It is an interprime number because it is at equal distance from previous prime (2165155357) and next prime (2165155373).

It is not a de Polignac number, because 2165155365 - 2³ = 2165155357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100729 + ... + 120318.

It is an arithmetic number, because the mean of its divisors is an integer number (216848088).

Almost surely, 2^2165155365 is an apocalyptic number.

It is an amenable number.

2165155365 is a deficient number, since it is larger than the sum of its proper divisors (1304414043).

2165155365 is a wasteful number, since it uses less digits than its factorization.

2165155365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221708.

The product of its digits is 135000, while the sum is 39.

The square root of 2165155365 is about 46531.2299966377. The cubic root of 2165155365 is about 1293.6884133207.

The spelling of 2165155365 in words is "two billion, one hundred sixty-five million, one hundred fifty-five thousand, three hundred sixty-five".