213321239 has 2 divisors, whose sum is σ = 213321240. Its totient is φ = 213321238.

The previous prime is 213321223. The next prime is 213321289. The reversal of 213321239 is 932123312.

213321239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213321239 - 2⁴ = 213321223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213321289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106660619 + 106660620.

It is an arithmetic number, because the mean of its divisors is an integer number (106660620).

Almost surely, 2^213321239 is an apocalyptic number.

213321239 is a deficient number, since it is larger than the sum of its proper divisors (1).

213321239 is an equidigital number, since it uses as much as digits as its factorization.

213321239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 213321239 is about 14605.5208397373. The cubic root of 213321239 is about 597.5093410770.

The spelling of 213321239 in words is "two hundred thirteen million, three hundred twenty-one thousand, two hundred thirty-nine".