219368921 has 8 divisors (see below), whose sum is σ = 224277600. Its totient is φ = 214508448.

The previous prime is 219368911. The next prime is 219368951. The reversal of 219368921 is 129863912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 219368921 - 2⁶ = 219368857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219368911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2771 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (28034700).

Almost surely, 2^219368921 is an apocalyptic number.

It is an amenable number.

219368921 is a deficient number, since it is larger than the sum of its proper divisors (4908679).

219368921 is a wasteful number, since it uses less digits than its factorization.

219368921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24103.

The product of its digits is 46656, while the sum is 41.

The square root of 219368921 is about 14811.1080274232. The cubic root of 219368921 is about 603.1032929125.

The spelling of 219368921 in words is "two hundred nineteen million, three hundred sixty-eight thousand, nine hundred twenty-one".