219780231 has 24 divisors (see below), whose sum is σ = 323610624. Its totient is φ = 131574240.

The previous prime is 219780139. The next prime is 219780257. The reversal of 219780231 is 132087912.

It is not a de Polignac number, because 219780231 - 2¹¹ = 219778183 is a prime.

It is a super-2 number, since 2×219780231² = 96606699876826722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 219780192 and 219780201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219780031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 959625 + ... + 959853.

It is an arithmetic number, because the mean of its divisors is an integer number (13483776).

Almost surely, 2^219780231 is an apocalyptic number.

219780231 is a deficient number, since it is larger than the sum of its proper divisors (103830393).

219780231 is a wasteful number, since it uses less digits than its factorization.

219780231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 219780231 is about 14824.9867116298. The cubic root of 219780231 is about 603.4799909715.

It can be divided in two parts, 2197 and 80231, that added together give a palindrome (82428).

The spelling of 219780231 in words is "two hundred nineteen million, seven hundred eighty thousand, two hundred thirty-one".