213442244231 has 2 divisors, whose sum is σ = 213442244232. Its totient is φ = 213442244230.

The previous prime is 213442244189. The next prime is 213442244269. The reversal of 213442244231 is 132442244312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213442244231 is a prime.

It is a super-2 number, since 2×213442244231² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213442246231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721122115 + 106721122116.

It is an arithmetic number, because the mean of its divisors is an integer number (106721122116).

Almost surely, 2^213442244231 is an apocalyptic number.

213442244231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213442244231 is an equidigital number, since it uses as much as digits as its factorization.

213442244231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 32.

Adding to 213442244231 its reverse (132442244312), we get a palindrome (345884488543).

The spelling of 213442244231 in words is "two hundred thirteen billion, four hundred forty-two million, two hundred forty-four thousand, two hundred thirty-one".