239824213 has 12 divisors (see below), whose sum is σ = 253738380. Its totient is φ = 226639296.

The previous prime is 239824183. The next prime is 239824217. The reversal of 239824213 is 312428932.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21316689 + 218507524 = 4617^2 + 14782^2 .

It is a de Polignac number, because none of the positive numbers 2^k-239824213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239824217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255481 + ... + 256417.

It is an arithmetic number, because the mean of its divisors is an integer number (21144865).

Almost surely, 2^239824213 is an apocalyptic number.

It is an amenable number.

239824213 is a deficient number, since it is larger than the sum of its proper divisors (13914167).

239824213 is an equidigital number, since it uses as much as digits as its factorization.

239824213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684 (or 1665 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 239824213 is about 15486.2588445370. The cubic root of 239824213 is about 621.2947388320.

The spelling of 239824213 in words is "two hundred thirty-nine million, eight hundred twenty-four thousand, two hundred thirteen".