219055231 has 4 divisors (see below), whose sum is σ = 219501864. Its totient is φ = 218608600.

The previous prime is 219055189. The next prime is 219055253. The reversal of 219055231 is 132550912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 219055231 - 2⁷ = 219055103 is a prime.

It is a super-2 number, since 2×219055231² = 95970388456926722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219055231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219055831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222580 + ... + 223561.

It is an arithmetic number, because the mean of its divisors is an integer number (54875466).

Almost surely, 2^219055231 is an apocalyptic number.

219055231 is a deficient number, since it is larger than the sum of its proper divisors (446633).

219055231 is an equidigital number, since it uses as much as digits as its factorization.

219055231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446632.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 219055231 is about 14800.5145518661. The cubic root of 219055231 is about 602.8156834675.

The spelling of 219055231 in words is "two hundred nineteen million, fifty-five thousand, two hundred thirty-one".