219532231 has 6 divisors (see below), whose sum is σ = 222444560. Its totient is φ = 216623316.

The previous prime is 219532193. The next prime is 219532241. The reversal of 219532231 is 132235912.

It is not a de Polignac number, because 219532231 - 2²¹ = 217435079 is a prime.

It is a super-2 number, since 2×219532231² = 96388800895674722, 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 219532231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219532241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130860 + ... + 132526.

Almost surely, 2^219532231 is an apocalyptic number.

219532231 is a deficient number, since it is larger than the sum of its proper divisors (2912329).

219532231 is an frugal number, since it uses more digits than its factorization.

219532231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413 (or 1746 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 219532231 is about 14816.6200936651. The cubic root of 219532231 is about 603.2529166108.

The spelling of 219532231 in words is "two hundred nineteen million, five hundred thirty-two thousand, two hundred thirty-one".