215225215 has 8 divisors (see below), whose sum is σ = 262648080. Its totient is φ = 169261632.

The previous prime is 215225183. The next prime is 215225251. The reversal of 215225215 is 512522512.

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 215225215 - 2⁵ = 215225183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215225215.

It is a congruent 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, 364494 + ... + 365083.

It is an arithmetic number, because the mean of its divisors is an integer number (32831010).

Almost surely, 2^215225215 is an apocalyptic number.

215225215 is a deficient number, since it is larger than the sum of its proper divisors (47422865).

215225215 is an equidigital number, since it uses as much as digits as its factorization.

215225215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729641.

The product of its digits is 2000, while the sum is 25.

The square root of 215225215 is about 14670.5560562645. The cubic root of 215225215 is about 599.2817470123.

Adding to 215225215 its reverse (512522512), we get a palindrome (727747727).

The spelling of 215225215 in words is "two hundred fifteen million, two hundred twenty-five thousand, two hundred fifteen".