2150665565 has 8 divisors (see below), whose sum is σ = 2581081440. Its totient is φ = 1720343952.

The previous prime is 2150665547. The next prime is 2150665567. The reversal of 2150665565 is 5655660512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2150665565 - 2⁶ = 2150665501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150665567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44522 + ... + 79268.

It is an arithmetic number, because the mean of its divisors is an integer number (322635180).

Almost surely, 2^2150665565 is an apocalyptic number.

It is an amenable number.

2150665565 is a deficient number, since it is larger than the sum of its proper divisors (430415875).

2150665565 is a wasteful number, since it uses less digits than its factorization.

2150665565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47131.

The product of its (nonzero) digits is 270000, while the sum is 41.

The square root of 2150665565 is about 46375.2688940991. The cubic root of 2150665565 is about 1290.7960483352.

The spelling of 2150665565 in words is "two billion, one hundred fifty million, six hundred sixty-five thousand, five hundred sixty-five".