213456239 has 2 divisors, whose sum is σ = 213456240. Its totient is φ = 213456238.

The previous prime is 213456151. The next prime is 213456253. The reversal of 213456239 is 932654312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213456239 - 2¹⁶ = 213390703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213456199 and 213456208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213456259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106728119 + 106728120.

It is an arithmetic number, because the mean of its divisors is an integer number (106728120).

Almost surely, 2^213456239 is an apocalyptic number.

213456239 is a deficient number, since it is larger than the sum of its proper divisors (1).

213456239 is an equidigital number, since it uses as much as digits as its factorization.

213456239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 213456239 is about 14610.1416488684. The cubic root of 213456239 is about 597.6353587697.

The spelling of 213456239 in words is "two hundred thirteen million, four hundred fifty-six thousand, two hundred thirty-nine".