1004431231 has 2 divisors, whose sum is σ = 1004431232. Its totient is φ = 1004431230.

The previous prime is 1004431187. The next prime is 1004431261. The reversal of 1004431231 is 1321344001.

It is a strong prime.

It is an emirp because it is prime and its reverse (1321344001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004431231 - 2¹¹ = 1004429183 is a prime.

It is a super-2 number, since 2×1004431231² = 2017764195616350722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1004431199 and 1004431208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004431261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502215615 + 502215616.

It is an arithmetic number, because the mean of its divisors is an integer number (502215616).

Almost surely, 2^1004431231 is an apocalyptic number.

1004431231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004431231 is an equidigital number, since it uses as much as digits as its factorization.

1004431231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1004431231 is about 31692.7630698240. The cubic root of 1004431231 is about 1001.4749005988.

Adding to 1004431231 its reverse (1321344001), we get a palindrome (2325775232).

The spelling of 1004431231 in words is "one billion, four million, four hundred thirty-one thousand, two hundred thirty-one".