213304031 has 2 divisors, whose sum is σ = 213304032. Its totient is φ = 213304030.

The previous prime is 213303997. The next prime is 213304033. The reversal of 213304031 is 130403312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213304031 - 2²² = 209109727 is a prime.

It is a super-2 number, since 2×213304031² = 90997219281697922, which contains 22 as substring.

Together with 213304033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213304033) 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, 106652015 + 106652016.

It is an arithmetic number, because the mean of its divisors is an integer number (106652016).

Almost surely, 2^213304031 is an apocalyptic number.

213304031 is a deficient number, since it is larger than the sum of its proper divisors (1).

213304031 is an equidigital number, since it uses as much as digits as its factorization.

213304031 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 213304031 is about 14604.9317355474. The cubic root of 213304031 is about 597.4932742017.

Adding to 213304031 its reverse (130403312), we get a palindrome (343707343).

The spelling of 213304031 in words is "two hundred thirteen million, three hundred four thousand, thirty-one".