215073 has 12 divisors (see below), whose sum is σ = 324480. Its totient is φ = 137016.

The previous prime is 215063. The next prime is 215077. The reversal of 215073 is 370512.

It is not a de Polignac number, because 215073 - 2⁸ = 214817 is a prime.

It is a Curzon number.

215073 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (215077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (27040).

2²¹⁵⁰⁷³ is an apocalyptic number.

215073 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

215073 is a deficient number, since it is larger than the sum of its proper divisors (109407).

215073 is a wasteful number, since it uses less digits than its factorization.

215073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 215073 is about 463.7596360185. The cubic root of 215073 is about 59.9140435837.

Adding to 215073 its reverse (370512), we get a palindrome (585585).

The spelling of 215073 in words is "two hundred fifteen thousand, seventy-three".