213533403 has 8 divisors (see below), whose sum is σ = 297090048. Its totient is φ = 136166184.

The previous prime is 213533393. The next prime is 213533407. The reversal of 213533403 is 304335312.

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 213533403 - 2⁴ = 213533387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213533407) 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, 1547275 + ... + 1547412.

It is an arithmetic number, because the mean of its divisors is an integer number (37136256).

Almost surely, 2^213533403 is an apocalyptic number.

213533403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213533403 is a deficient number, since it is larger than the sum of its proper divisors (83556645).

213533403 is a wasteful number, since it uses less digits than its factorization.

213533403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094713.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 213533403 is about 14612.7821786270. The cubic root of 213533403 is about 597.7073647528.

Adding to 213533403 its reverse (304335312), we get a palindrome (517868715).

The spelling of 213533403 in words is "two hundred thirteen million, five hundred thirty-three thousand, four hundred three".