219681323 has 2 divisors, whose sum is σ = 219681324. Its totient is φ = 219681322.

The previous prime is 219681311. The next prime is 219681347. The reversal of 219681323 is 323186912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 219681323 - 2¹⁶ = 219615787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (219681223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109840661 + 109840662.

It is an arithmetic number, because the mean of its divisors is an integer number (109840662).

Almost surely, 2^219681323 is an apocalyptic number.

219681323 is a deficient number, since it is larger than the sum of its proper divisors (1).

219681323 is an equidigital number, since it uses as much as digits as its factorization.

219681323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 219681323 is about 14821.6504816434. The cubic root of 219681323 is about 603.3894490775.

The spelling of 219681323 in words is "two hundred nineteen million, six hundred eighty-one thousand, three hundred twenty-three".