213663287 has 2 divisors, whose sum is σ = 213663288. Its totient is φ = 213663286.

The previous prime is 213663277. The next prime is 213663319. The reversal of 213663287 is 782366312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213663287 - 2⁶ = 213663223 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213663287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213663277) 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, 106831643 + 106831644.

It is an arithmetic number, because the mean of its divisors is an integer number (106831644).

Almost surely, 2^213663287 is an apocalyptic number.

213663287 is a deficient number, since it is larger than the sum of its proper divisors (1).

213663287 is an equidigital number, since it uses as much as digits as its factorization.

213663287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 213663287 is about 14617.2256943649. The cubic root of 213663287 is about 597.8285275112.

The spelling of 213663287 in words is "two hundred thirteen million, six hundred sixty-three thousand, two hundred eighty-seven".