213144443023 has 4 divisors (see below), whose sum is σ = 213175131480. Its totient is φ = 213113754568.

The previous prime is 213144442993. The next prime is 213144443093. The reversal of 213144443023 is 320344441312.

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-213144443023 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 (213144443093) 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, 15333808 + ... + 15347701.

It is an arithmetic number, because the mean of its divisors is an integer number (53293782870).

Almost surely, 2^213144443023 is an apocalyptic number.

213144443023 is a deficient number, since it is larger than the sum of its proper divisors (30688457).

213144443023 is an equidigital number, since it uses as much as digits as its factorization.

213144443023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30688456.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 213144443023 its reverse (320344441312), we get a palindrome (533488884335).

The spelling of 213144443023 in words is "two hundred thirteen billion, one hundred forty-four million, four hundred forty-three thousand, twenty-three".