213499331 has 2 divisors, whose sum is σ = 213499332. Its totient is φ = 213499330.

The previous prime is 213499301. The next prime is 213499367. The reversal of 213499331 is 133994312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213499331 - 2⁶ = 213499267 is a prime.

It is a super-2 number, since 2×213499331² = 91163928674895122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213499291 and 213499300.

It is not a weakly prime, because it can be changed into another prime (213499301) 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, 106749665 + 106749666.

It is an arithmetic number, because the mean of its divisors is an integer number (106749666).

Almost surely, 2^213499331 is an apocalyptic number.

213499331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213499331 is an equidigital number, since it uses as much as digits as its factorization.

213499331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 213499331 is about 14611.6163034758. The cubic root of 213499331 is about 597.6755724300.

The spelling of 213499331 in words is "two hundred thirteen million, four hundred ninety-nine thousand, three hundred thirty-one".