231013219 has 4 divisors (see below), whose sum is σ = 241057296. Its totient is φ = 220969144.

The previous prime is 231013199. The next prime is 231013247. The reversal of 231013219 is 912310132.

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 231013219 - 2⁷ = 231013091 is a prime.

It is a super-2 number, since 2×231013219² = 106734214705483922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 231013219.

It is not an unprimeable number, because it can be changed into a prime (231013249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5022004 + ... + 5022049.

It is an arithmetic number, because the mean of its divisors is an integer number (60264324).

Almost surely, 2^231013219 is an apocalyptic number.

231013219 is a deficient number, since it is larger than the sum of its proper divisors (10044077).

231013219 is a wasteful number, since it uses less digits than its factorization.

231013219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10044076.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 231013219 is about 15199.1190205222. The cubic root of 231013219 is about 613.5909477892.

The spelling of 231013219 in words is "two hundred thirty-one million, thirteen thousand, two hundred nineteen".