212310223 has 2 divisors, whose sum is σ = 212310224. Its totient is φ = 212310222.

The previous prime is 212310187. The next prime is 212310253. The reversal of 212310223 is 322013212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212310223 is a prime.

It is equal to p_11722021 and since 212310223 and 11722021 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 212310197 and 212310206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212310253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106155111 + 106155112.

It is an arithmetic number, because the mean of its divisors is an integer number (106155112).

Almost surely, 2^212310223 is an apocalyptic number.

212310223 is a deficient number, since it is larger than the sum of its proper divisors (1).

212310223 is an equidigital number, since it uses as much as digits as its factorization.

212310223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 212310223 is about 14570.8689857537. The cubic root of 212310223 is about 596.5638994001.

Adding to 212310223 its reverse (322013212), we get a palindrome (534323435).

The spelling of 212310223 in words is "two hundred twelve million, three hundred ten thousand, two hundred twenty-three".