215803 has 4 divisors (see below), whose sum is σ = 246640. Its totient is φ = 184968.

The previous prime is 215801. The next prime is 215827. The reversal of 215803 is 308512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 215803 - 2¹ = 215801 is a prime.

It is a super-3 number, since 3×215803³ = 30150442333759881, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15408 + ... + 15421.

It is an arithmetic number, because the mean of its divisors is an integer number (61660).

2²¹⁵⁸⁰³ is an apocalyptic number.

215803 is a deficient number, since it is larger than the sum of its proper divisors (30837).

215803 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 215803 = (358021)₉.

215803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30836.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 215803 is about 464.5460149436. The cubic root of 215803 is about 59.9817537110.

The spelling of 215803 in words is "two hundred fifteen thousand, eight hundred three".