215928965 has 8 divisors (see below), whose sum is σ = 296131200. Its totient is φ = 148065552.

The previous prime is 215928961. The next prime is 215928989. The reversal of 215928965 is 569829512.

215928965 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 215928965 - 2² = 215928961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215928961) 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, 3084665 + ... + 3084734.

It is an arithmetic number, because the mean of its divisors is an integer number (37016400).

Almost surely, 2^215928965 is an apocalyptic number.

It is an amenable number.

215928965 is a deficient number, since it is larger than the sum of its proper divisors (80202235).

215928965 is an equidigital number, since it uses as much as digits as its factorization.

215928965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169411.

The product of its digits is 388800, while the sum is 47.

The square root of 215928965 is about 14694.5215982011. The cubic root of 215928965 is about 599.9342196404.

The spelling of 215928965 in words is "two hundred fifteen million, nine hundred twenty-eight thousand, nine hundred sixty-five".