215733 has 8 divisors (see below), whose sum is σ = 328768. Its totient is φ = 123264.

The previous prime is 215723. The next prime is 215737. The reversal of 215733 is 337512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215733 - 2¹³ = 207541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10273 = 215733 / (2 + 1 + 5 + 7 + 3 + 3).

It is a d-powerful number, because it can be written as 2⁵ + 1 + 7⁶ + 5⁷ + 3⁵ + 3⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5116 + ... + 5157.

It is an arithmetic number, because the mean of its divisors is an integer number (41096).

2²¹⁵⁷³³ is an apocalyptic number.

It is an amenable number.

215733 is a deficient number, since it is larger than the sum of its proper divisors (113035).

215733 is a wasteful number, since it uses less digits than its factorization.

215733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283.

The product of its digits is 630, while the sum is 21.

The square root of 215733 is about 464.4706664581. The cubic root of 215733 is about 59.9752675843.

The spelling of 215733 in words is "two hundred fifteen thousand, seven hundred thirty-three".