215015 has 4 divisors (see below), whose sum is σ = 258024. Its totient is φ = 172008.

The previous prime is 214993. The next prime is 215051. The reversal of 215015 is 510512.

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 215015 - 2⁸ = 214759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21497 + ... + 21506.

It is an arithmetic number, because the mean of its divisors is an integer number (64506).

2²¹⁵⁰¹⁵ is an apocalyptic number.

215015 is a deficient number, since it is larger than the sum of its proper divisors (43009).

215015 is an equidigital number, since it uses as much as digits as its factorization.

215015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43008.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 215015 is about 463.6970994087. The cubic root of 215015 is about 59.9086573087.

Adding to 215015 its reverse (510512), we get a palindrome (725527).

The spelling of 215015 in words is "two hundred fifteen thousand, fifteen".