213231522203 has 4 divisors (see below), whose sum is σ = 243693168240. Its totient is φ = 182769876168.

The previous prime is 213231522197. The next prime is 213231522263. The reversal of 213231522203 is 302225132312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213231522203 is a prime.

It is a super-2 number, since 2×213231522203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213231522263) 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, 15230823008 + ... + 15230823021.

It is an arithmetic number, because the mean of its divisors is an integer number (60923292060).

Almost surely, 2^213231522203 is an apocalyptic number.

213231522203 is a deficient number, since it is larger than the sum of its proper divisors (30461646037).

213231522203 is an equidigital number, since it uses as much as digits as its factorization.

213231522203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30461646036.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 213231522203 its reverse (302225132312), we get a palindrome (515456654515).

The spelling of 213231522203 in words is "two hundred thirteen billion, two hundred thirty-one million, five hundred twenty-two thousand, two hundred three".