231204469 has 2 divisors, whose sum is σ = 231204470. Its totient is φ = 231204468.

The previous prime is 231204451. The next prime is 231204503. The reversal of 231204469 is 964402132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117462244 + 113742225 = 10838^2 + 10665^2 .

It is a cyclic number.

It is not a de Polignac number, because 231204469 - 2⁷ = 231204341 is a prime.

It is a super-2 number, since 2×231204469² = 106911012971143922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231204469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231204569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115602234 + 115602235.

It is an arithmetic number, because the mean of its divisors is an integer number (115602235).

Almost surely, 2^231204469 is an apocalyptic number.

It is an amenable number.

231204469 is a deficient number, since it is larger than the sum of its proper divisors (1).

231204469 is an equidigital number, since it uses as much as digits as its factorization.

231204469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 231204469 is about 15205.4092019912. The cubic root of 231204469 is about 613.7602265584.

The spelling of 231204469 in words is "two hundred thirty-one million, two hundred four thousand, four hundred sixty-nine".