213562243 has 2 divisors, whose sum is σ = 213562244. Its totient is φ = 213562242.

The previous prime is 213562229. The next prime is 213562253. The reversal of 213562243 is 342265312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213562243 - 2⁹ = 213561731 is a prime.

It is not a weakly prime, because it can be changed into another prime (213562253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106781121 + 106781122.

It is an arithmetic number, because the mean of its divisors is an integer number (106781122).

Almost surely, 2^213562243 is an apocalyptic number.

213562243 is a deficient number, since it is larger than the sum of its proper divisors (1).

213562243 is an equidigital number, since it uses as much as digits as its factorization.

213562243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 213562243 is about 14613.7689526008. The cubic root of 213562243 is about 597.7342724936.

The spelling of 213562243 in words is "two hundred thirteen million, five hundred sixty-two thousand, two hundred forty-three".