231431219 has 2 divisors, whose sum is σ = 231431220. Its totient is φ = 231431218.

The previous prime is 231431201. The next prime is 231431237. The reversal of 231431219 is 912134132.

It is a balanced prime because it is at equal distance from previous prime (231431201) and next prime (231431237).

It is a cyclic number.

It is not a de Polignac number, because 231431219 - 2¹² = 231427123 is a prime.

It is a super-2 number, since 2×231431219² = 107120818255651922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231431279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115715609 + 115715610.

It is an arithmetic number, because the mean of its divisors is an integer number (115715610).

Almost surely, 2^231431219 is an apocalyptic number.

231431219 is a deficient number, since it is larger than the sum of its proper divisors (1).

231431219 is an equidigital number, since it uses as much as digits as its factorization.

231431219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 231431219 is about 15212.8636028856. The cubic root of 231431219 is about 613.9608061009.

It can be divided in two parts, 2314 and 31219, that added together give a palindrome (33533).

The spelling of 231431219 in words is "two hundred thirty-one million, four hundred thirty-one thousand, two hundred nineteen".