1240303231 has 2 divisors, whose sum is σ = 1240303232. Its totient is φ = 1240303230.

The previous prime is 1240303193. The next prime is 1240303247. The reversal of 1240303231 is 1323030421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240303231 - 2²⁵ = 1206748799 is a prime.

It is a super-2 number, since 2×1240303231² = 3076704209658078722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240303199 and 1240303208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240306231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620151615 + 620151616.

It is an arithmetic number, because the mean of its divisors is an integer number (620151616).

Almost surely, 2^1240303231 is an apocalyptic number.

1240303231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240303231 is an equidigital number, since it uses as much as digits as its factorization.

1240303231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1240303231 is about 35217.9390510007. The cubic root of 1240303231 is about 1074.4246370516.

Adding to 1240303231 its reverse (1323030421), we get a palindrome (2563333652).

The spelling of 1240303231 in words is "one billion, two hundred forty million, three hundred three thousand, two hundred thirty-one".