213262691 has 2 divisors, whose sum is σ = 213262692. Its totient is φ = 213262690.

The previous prime is 213262681. The next prime is 213262717. The reversal of 213262691 is 196262312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213262691 - 2¹⁰ = 213261667 is a prime.

It is a super-2 number, since 2×213262691² = 90961950745122962, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (213262681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106631345 + 106631346.

It is an arithmetic number, because the mean of its divisors is an integer number (106631346).

Almost surely, 2^213262691 is an apocalyptic number.

213262691 is a deficient number, since it is larger than the sum of its proper divisors (1).

213262691 is an equidigital number, since it uses as much as digits as its factorization.

213262691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 213262691 is about 14603.5163916092. The cubic root of 213262691 is about 597.4546720748.

The spelling of 213262691 in words is "two hundred thirteen million, two hundred sixty-two thousand, six hundred ninety-one".