215423 has 8 divisors (see below), whose sum is σ = 236208. Its totient is φ = 195264.

The previous prime is 215417. The next prime is 215443. The reversal of 215423 is 324512.

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

It is a cyclic number.

It is not a de Polignac number, because 215423 - 2⁶ = 215359 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 4⁶ + 5⁷ + 2¹⁷ + 3⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215443) 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, 836 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (29526).

2²¹⁵⁴²³ is an apocalyptic number.

215423 is a deficient number, since it is larger than the sum of its proper divisors (20785).

215423 is a wasteful number, since it uses less digits than its factorization.

215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 240, while the sum is 17.

The square root of 215423 is about 464.1368332723. The cubic root of 215423 is about 59.9465264312.

Adding to 215423 its reverse (324512), we get a palindrome (539935).

The spelling of 215423 in words is "two hundred fifteen thousand, four hundred twenty-three".