213244042403 has 4 divisors (see below), whose sum is σ = 243707477040. Its totient is φ = 182780607768.

The previous prime is 213244042397. The next prime is 213244042433. The reversal of 213244042403 is 304240442312.

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 213244042403 - 2⁸ = 213244042147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244042433) 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, 15231717308 + ... + 15231717321.

It is an arithmetic number, because the mean of its divisors is an integer number (60926869260).

Almost surely, 2^213244042403 is an apocalyptic number.

213244042403 is a deficient number, since it is larger than the sum of its proper divisors (30463434637).

213244042403 is an equidigital number, since it uses as much as digits as its factorization.

213244042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30463434636.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 213244042403 its reverse (304240442312), we get a palindrome (517484484715).

The spelling of 213244042403 in words is "two hundred thirteen billion, two hundred forty-four million, forty-two thousand, four hundred three".