213030331 has 2 divisors, whose sum is σ = 213030332. Its totient is φ = 213030330.

The previous prime is 213030313. The next prime is 213030359. The reversal of 213030331 is 133030312.

Together with previous prime (213030313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213030331 - 2⁷ = 213030203 is a prime.

It is a super-2 number, since 2×213030331² = 90763843851939122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213930331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515165 + 106515166.

It is an arithmetic number, because the mean of its divisors is an integer number (106515166).

Almost surely, 2^213030331 is an apocalyptic number.

213030331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213030331 is an equidigital number, since it uses as much as digits as its factorization.

213030331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 213030331 is about 14595.5586052744. The cubic root of 213030331 is about 597.2376079833.

Adding to 213030331 its reverse (133030312), we get a palindrome (346060643).

The spelling of 213030331 in words is "two hundred thirteen million, thirty thousand, three hundred thirty-one".