213555239 has 2 divisors, whose sum is σ = 213555240. Its totient is φ = 213555238.

The previous prime is 213555229. The next prime is 213555257. The reversal of 213555239 is 932555312.

213555239 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 a de Polignac number, because none of the positive numbers 2^k-213555239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213555199 and 213555208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213555229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106777619 + 106777620.

It is an arithmetic number, because the mean of its divisors is an integer number (106777620).

Almost surely, 2^213555239 is an apocalyptic number.

213555239 is a deficient number, since it is larger than the sum of its proper divisors (1).

213555239 is an equidigital number, since it uses as much as digits as its factorization.

213555239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 35.

The square root of 213555239 is about 14613.5293136189. The cubic root of 213555239 is about 597.7277379793.

The spelling of 213555239 in words is "two hundred thirteen million, five hundred fifty-five thousand, two hundred thirty-nine".