215165361 has 8 divisors (see below), whose sum is σ = 291590464. Its totient is φ = 141091920.

The previous prime is 215165359. The next prime is 215165369. The reversal of 215165361 is 163561512.

215165361 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 not a de Polignac number, because 215165361 - 2¹ = 215165359 is a prime.

It is a super-2 number, since 2×215165361² = 92592265148520642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215165369) 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, 587701 + ... + 588066.

It is an arithmetic number, because the mean of its divisors is an integer number (36448808).

Almost surely, 2^215165361 is an apocalyptic number.

It is an amenable number.

215165361 is a deficient number, since it is larger than the sum of its proper divisors (76425103).

215165361 is a wasteful number, since it uses less digits than its factorization.

215165361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175831.

The product of its digits is 5400, while the sum is 30.

The square root of 215165361 is about 14668.5159781077. The cubic root of 215165361 is about 599.2261885666.

The spelling of 215165361 in words is "two hundred fifteen million, one hundred sixty-five thousand, three hundred sixty-one".