213440221223 has 4 divisors (see below), whose sum is σ = 213458710848. Its totient is φ = 213421731600.

The previous prime is 213440221177. The next prime is 213440221243. The reversal of 213440221223 is 322122044312.

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 213440221223 - 2¹⁰ = 213440220199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213440221192 and 213440221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213440221243) 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, 9227486 + ... + 9250587.

It is an arithmetic number, because the mean of its divisors is an integer number (53364677712).

Almost surely, 2^213440221223 is an apocalyptic number.

213440221223 is a deficient number, since it is larger than the sum of its proper divisors (18489625).

213440221223 is a wasteful number, since it uses less digits than its factorization.

213440221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18489624.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 213440221223 its reverse (322122044312), we get a palindrome (535562265535).

The spelling of 213440221223 in words is "two hundred thirteen billion, four hundred forty million, two hundred twenty-one thousand, two hundred twenty-three".