213310243 has 2 divisors, whose sum is σ = 213310244. Its totient is φ = 213310242.

The previous prime is 213310231. The next prime is 213310247. The reversal of 213310243 is 342013312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213310243 - 2²¹ = 211213091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213310243.

It is not a weakly prime, because it can be changed into another prime (213310247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106655121 + 106655122.

It is an arithmetic number, because the mean of its divisors is an integer number (106655122).

Almost surely, 2^213310243 is an apocalyptic number.

213310243 is a deficient number, since it is larger than the sum of its proper divisors (1).

213310243 is an equidigital number, since it uses as much as digits as its factorization.

213310243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 213310243 is about 14605.1444018880. The cubic root of 213310243 is about 597.4990743612.

Adding to 213310243 its reverse (342013312), we get a palindrome (555323555).

It can be divided in two parts, 2133102 and 43, that added together give a triangular number (2133145 = T₂₀₆₅).

The spelling of 213310243 in words is "two hundred thirteen million, three hundred ten thousand, two hundred forty-three".