213310403 has 2 divisors, whose sum is σ = 213310404. Its totient is φ = 213310402.

The previous prime is 213310387. The next prime is 213310417. The reversal of 213310403 is 304013312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213310403 - 2⁴ = 213310387 is a prime.

It is not a weakly prime, because it can be changed into another prime (213310423) 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, 106655201 + 106655202.

It is an arithmetic number, because the mean of its divisors is an integer number (106655202).

Almost surely, 2^213310403 is an apocalyptic number.

213310403 is a deficient number, since it is larger than the sum of its proper divisors (1).

213310403 is an equidigital number, since it uses as much as digits as its factorization.

213310403 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 213310403 is about 14605.1498794090. The cubic root of 213310403 is about 597.4992237521.

Adding to 213310403 its reverse (304013312), we get a palindrome (517323715).

The spelling of 213310403 in words is "two hundred thirteen million, three hundred ten thousand, four hundred three".