231219 has 12 divisors (see below), whose sum is σ = 348816. Its totient is φ = 147312.

The previous prime is 231197. The next prime is 231223. The reversal of 231219 is 912132.

It is a happy number.

It is not a de Polignac number, because 231219 - 2¹¹ = 229171 is a prime.

It is a super-2 number, since 2×231219² = 106924451922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (231269) 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, 352 + ... + 765.

It is an arithmetic number, because the mean of its divisors is an integer number (29068).

2²³¹²¹⁹ is an apocalyptic number.

231219 is a deficient number, since it is larger than the sum of its proper divisors (117597).

231219 is a wasteful number, since it uses less digits than its factorization.

231219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1143 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 231219 is about 480.8523681963. The cubic root of 231219 is about 61.3773084388.

The spelling of 231219 in words is "two hundred thirty-one thousand, two hundred nineteen".