215165161 has 8 divisors (see below), whose sum is σ = 224884800. Its totient is φ = 205475952.

The previous prime is 215165147. The next prime is 215165179. The reversal of 215165161 is 161561512.

It is a happy number.

215165161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 215165161 - 2⁷ = 215165033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215165191) 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, 7515 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (28110600).

Almost surely, 2^215165161 is an apocalyptic number.

It is an amenable number.

215165161 is a deficient number, since it is larger than the sum of its proper divisors (9719639).

215165161 is a wasteful number, since it uses less digits than its factorization.

215165161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215.

The product of its digits is 1800, while the sum is 28.

The square root of 215165161 is about 14668.5091607839. The cubic root of 215165161 is about 599.2260029027.

The spelling of 215165161 in words is "two hundred fifteen million, one hundred sixty-five thousand, one hundred sixty-one".