215415223 has 4 divisors (see below), whose sum is σ = 216618840. Its totient is φ = 214211608.

The previous prime is 215415209. The next prime is 215415227. The reversal of 215415223 is 322514512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215415223 - 2⁵ = 215415191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215415227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601540 + ... + 601897.

It is an arithmetic number, because the mean of its divisors is an integer number (54154710).

Almost surely, 2^215415223 is an apocalyptic number.

215415223 is a deficient number, since it is larger than the sum of its proper divisors (1203617).

215415223 is a wasteful number, since it uses less digits than its factorization.

215415223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203616.

The product of its digits is 2400, while the sum is 25.

The square root of 215415223 is about 14677.0304557836. The cubic root of 215415223 is about 599.4580504467.

Adding to 215415223 its reverse (322514512), we get a palindrome (537929735).

The spelling of 215415223 in words is "two hundred fifteen million, four hundred fifteen thousand, two hundred twenty-three".