19881223 has 8 divisors (see below), whose sum is σ = 20791296. Its totient is φ = 18975000.

The previous prime is 19881193. The next prime is 19881227. The reversal of 19881223 is 32218891.

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

It is not a de Polignac number, because 19881223 - 2⁹ = 19880711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19881227) 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, 16698 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (2598912).

Almost surely, 2^19881223 is an apocalyptic number.

19881223 is a deficient number, since it is larger than the sum of its proper divisors (910073).

19881223 is a wasteful number, since it uses less digits than its factorization.

19881223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925.

The product of its digits is 6912, while the sum is 34.

The square root of 19881223 is about 4458.8365074311. The cubic root of 19881223 is about 270.9033437522.

The spelling of 19881223 in words is "nineteen million, eight hundred eighty-one thousand, two hundred twenty-three".