213038239 has 2 divisors, whose sum is σ = 213038240. Its totient is φ = 213038238.

The previous prime is 213038233. The next prime is 213038251. The reversal of 213038239 is 932830312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213038239 - 2¹¹ = 213036191 is a prime.

It is a super-2 number, since 2×213038239² = 90770582552442242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213038239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213038233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106519119 + 106519120.

It is an arithmetic number, because the mean of its divisors is an integer number (106519120).

Almost surely, 2^213038239 is an apocalyptic number.

213038239 is a deficient number, since it is larger than the sum of its proper divisors (1).

213038239 is an equidigital number, since it uses as much as digits as its factorization.

213038239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 213038239 is about 14595.8295070887. The cubic root of 213038239 is about 597.2449980054.

The spelling of 213038239 in words is "two hundred thirteen million, thirty-eight thousand, two hundred thirty-nine".