213204503 has 4 divisors (see below), whose sum is σ = 222474288. Its totient is φ = 203934720.

The previous prime is 213204499. The next prime is 213204539. The reversal of 213204503 is 305402312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213204503 - 2² = 213204499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213204403) 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, 4634858 + ... + 4634903.

It is an arithmetic number, because the mean of its divisors is an integer number (55618572).

Almost surely, 2^213204503 is an apocalyptic number.

213204503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213204503 is a deficient number, since it is larger than the sum of its proper divisors (9269785).

213204503 is an equidigital number, since it uses as much as digits as its factorization.

213204503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269784.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 213204503 is about 14601.5239958026. The cubic root of 213204503 is about 597.4003293069.

Adding to 213204503 its reverse (305402312), we get a palindrome (518606815).

The spelling of 213204503 in words is "two hundred thirteen million, two hundred four thousand, five hundred three".