213312623 has 2 divisors, whose sum is σ = 213312624. Its totient is φ = 213312622.

The previous prime is 213312599. The next prime is 213312641. The reversal of 213312623 is 326213312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213312623 - 2¹⁸ = 213050479 is a prime.

It is a super-2 number, since 2×213312623² = 91004550262280258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213312653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106656311 + 106656312.

It is an arithmetic number, because the mean of its divisors is an integer number (106656312).

Almost surely, 2^213312623 is an apocalyptic number.

213312623 is a deficient number, since it is larger than the sum of its proper divisors (1).

213312623 is an equidigital number, since it uses as much as digits as its factorization.

213312623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 213312623 is about 14605.2258798007. The cubic root of 213312623 is about 597.5012965431.

Adding to 213312623 its reverse (326213312), we get a palindrome (539525935).

The spelling of 213312623 in words is "two hundred thirteen million, three hundred twelve thousand, six hundred twenty-three".