213244331 has 2 divisors, whose sum is σ = 213244332. Its totient is φ = 213244330.

The previous prime is 213244327. The next prime is 213244351. The reversal of 213244331 is 133442312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213244331 - 2² = 213244327 is a prime.

It is a super-2 number, since 2×213244331² = 90946289407275122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213244297 and 213244306.

It is not a weakly prime, because it can be changed into another prime (213244351) 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, 106622165 + 106622166.

It is an arithmetic number, because the mean of its divisors is an integer number (106622166).

Almost surely, 2^213244331 is an apocalyptic number.

213244331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213244331 is an equidigital number, since it uses as much as digits as its factorization.

213244331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 213244331 is about 14602.8877623571. The cubic root of 213244331 is about 597.4375264245.

Adding to 213244331 its reverse (133442312), we get a palindrome (346686643).

The spelling of 213244331 in words is "two hundred thirteen million, two hundred forty-four thousand, three hundred thirty-one".