215114665 has 8 divisors (see below), whose sum is σ = 258267528. Its totient is φ = 172005120.

The previous prime is 215114639. The next prime is 215114701. The reversal of 215114665 is 566411512.

215114665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 55041561 + 160073104 = 7419^2 + 12652^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-215114665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 20785.

It is an arithmetic number, because the mean of its divisors is an integer number (32283441).

Almost surely, 2^215114665 is an apocalyptic number.

It is an amenable number.

215114665 is a deficient number, since it is larger than the sum of its proper divisors (43152863).

215114665 is a wasteful number, since it uses less digits than its factorization.

215114665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21659.

The product of its digits is 7200, while the sum is 31.

The square root of 215114665 is about 14666.7878214693. The cubic root of 215114665 is about 599.1791228170.

The spelling of 215114665 in words is "two hundred fifteen million, one hundred fourteen thousand, six hundred sixty-five".