213664223 has 2 divisors, whose sum is σ = 213664224. Its totient is φ = 213664222.

The previous prime is 213664219. The next prime is 213664229. The reversal of 213664223 is 322466312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213664223 - 2² = 213664219 is a prime.

It is equal to p_11792531 and since 213664223 and 11792531 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213664229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106832111 + 106832112.

It is an arithmetic number, because the mean of its divisors is an integer number (106832112).

Almost surely, 2^213664223 is an apocalyptic number.

213664223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213664223 is an equidigital number, since it uses as much as digits as its factorization.

213664223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 213664223 is about 14617.2577113493. The cubic root of 213664223 is about 597.8294004840.

The spelling of 213664223 in words is "two hundred thirteen million, six hundred sixty-four thousand, two hundred twenty-three".