215229 has 16 divisors (see below), whose sum is σ = 338048. Its totient is φ = 119232.

The previous prime is 215197. The next prime is 215239. The reversal of 215229 is 922512.

It is not a de Polignac number, because 215229 - 2⁵ = 215197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

215229 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639 + ... + 915.

It is an arithmetic number, because the mean of its divisors is an integer number (21128).

2²¹⁵²²⁹ is an apocalyptic number.

It is an amenable number.

215229 is a deficient number, since it is larger than the sum of its proper divisors (122819).

215229 is a wasteful number, since it uses less digits than its factorization.

215229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

The product of its digits is 360, while the sum is 21.

The square root of 215229 is about 463.9277961062. The cubic root of 215229 is about 59.9285260027.

It can be divided in two parts, 215 and 229, that added together give a palindrome (444).

The spelling of 215229 in words is "two hundred fifteen thousand, two hundred twenty-nine".