213186331 has 2 divisors, whose sum is σ = 213186332. Its totient is φ = 213186330.

The previous prime is 213186283. The next prime is 213186361. The reversal of 213186331 is 133681312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213186331 - 2⁷ = 213186203 is a prime.

It is a super-2 number, since 2×213186331² = 90896823450483122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213186331.

It is not a weakly prime, because it can be changed into another prime (213186361) 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, 106593165 + 106593166.

It is an arithmetic number, because the mean of its divisors is an integer number (106593166).

Almost surely, 2^213186331 is an apocalyptic number.

213186331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213186331 is an equidigital number, since it uses as much as digits as its factorization.

213186331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 213186331 is about 14600.9017187296. The cubic root of 213186331 is about 597.3833561394.

The spelling of 213186331 in words is "two hundred thirteen million, one hundred eighty-six thousand, three hundred thirty-one".