1204311431 has 2 divisors, whose sum is σ = 1204311432. Its totient is φ = 1204311430.

The previous prime is 1204311413. The next prime is 1204311469. The reversal of 1204311431 is 1341134021.

Together with previous prime (1204311413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1341134021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1204311431 - 2¹⁴ = 1204295047 is a prime.

It is a super-2 number, since 2×1204311431² = 2900732045674535522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204310431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602155715 + 602155716.

It is an arithmetic number, because the mean of its divisors is an integer number (602155716).

Almost surely, 2^1204311431 is an apocalyptic number.

1204311431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204311431 is an equidigital number, since it uses as much as digits as its factorization.

1204311431 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 20.

The square root of 1204311431 is about 34703.1905017392. The cubic root of 1204311431 is about 1063.9297089143.

Adding to 1204311431 its reverse (1341134021), we get a palindrome (2545445452).

The spelling of 1204311431 in words is "one billion, two hundred four million, three hundred eleven thousand, four hundred thirty-one".