219920823 has 12 divisors (see below), whose sum is σ = 336349728. Its totient is φ = 137989440.

The previous prime is 219920809. The next prime is 219920893. The reversal of 219920823 is 328029912.

It is not a de Polignac number, because 219920823 - 2¹⁴ = 219904439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219920893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718543 + ... + 718848.

It is an arithmetic number, because the mean of its divisors is an integer number (28029144).

Almost surely, 2^219920823 is an apocalyptic number.

219920823 is a deficient number, since it is larger than the sum of its proper divisors (116428905).

219920823 is a wasteful number, since it uses less digits than its factorization.

219920823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437414 (or 1437411 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 219920823 is about 14829.7276778773. The cubic root of 219920823 is about 603.6086442986.

The spelling of 219920823 in words is "two hundred nineteen million, nine hundred twenty thousand, eight hundred twenty-three".