215226 has 24 divisors (see below), whose sum is σ = 509184. Its totient is φ = 65160.

The previous prime is 215197. The next prime is 215239. The reversal of 215226 is 622512.

215226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215199 and 215208.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 741.

It is an arithmetic number, because the mean of its divisors is an integer number (21216).

2²¹⁵²²⁶ is an apocalyptic number.

215226 is an abundant number, since it is smaller than the sum of its proper divisors (293958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215226 is a wasteful number, since it uses less digits than its factorization.

215226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1103 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 215226 is about 463.9245628332. The cubic root of 215226 is about 59.9282475607.

Adding to 215226 its reverse (622512), we get a palindrome (837738).

It can be divided in two parts, 21522 and 6, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 215226 in words is "two hundred fifteen thousand, two hundred twenty-six".