213222247 has 16 divisors (see below), whose sum is σ = 253388800. Its totient is φ = 175569120.

The previous prime is 213222227. The next prime is 213222271. The reversal of 213222247 is 742222312.

It is not a de Polignac number, because 213222247 - 2¹⁹ = 212697959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213222227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26629 + ... + 33697.

It is an arithmetic number, because the mean of its divisors is an integer number (15836800).

Almost surely, 2^213222247 is an apocalyptic number.

213222247 is a deficient number, since it is larger than the sum of its proper divisors (40166553).

213222247 is a wasteful number, since it uses less digits than its factorization.

213222247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246.

The product of its digits is 2688, while the sum is 25.

The square root of 213222247 is about 14602.1315909699. The cubic root of 213222247 is about 597.4169017795.

Adding to 213222247 its reverse (742222312), we get a palindrome (955444559).

The spelling of 213222247 in words is "two hundred thirteen million, two hundred twenty-two thousand, two hundred forty-seven".