213031223 has 2 divisors, whose sum is σ = 213031224. Its totient is φ = 213031222.

The previous prime is 213031219. The next prime is 213031271. The reversal of 213031223 is 322130312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213031223 - 2² = 213031219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213031723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515611 + 106515612.

It is an arithmetic number, because the mean of its divisors is an integer number (106515612).

Almost surely, 2^213031223 is an apocalyptic number.

213031223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213031223 is an equidigital number, since it uses as much as digits as its factorization.

213031223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213031223 is about 14595.5891624833. The cubic root of 213031223 is about 597.2384415660.

Adding to 213031223 its reverse (322130312), we get a palindrome (535161535).

The spelling of 213031223 in words is "two hundred thirteen million, thirty-one thousand, two hundred twenty-three".