1240424223431 has 2 divisors, whose sum is σ = 1240424223432. Its totient is φ = 1240424223430.

The previous prime is 1240424223419. The next prime is 1240424223433. The reversal of 1240424223431 is 1343224240421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240424223431 - 2³⁸ = 965546316487 is a prime.

It is a super-2 number, since 2×1240424223431² (a number of 25 digits) contains 22 as substring.

Together with 1240424223433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240424223433) 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, 620212111715 + 620212111716.

It is an arithmetic number, because the mean of its divisors is an integer number (620212111716).

Almost surely, 2^{1240424223431} is an apocalyptic number.

1240424223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240424223431 is an equidigital number, since it uses as much as digits as its factorization.

1240424223431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 1240424223431 its reverse (1343224240421), we get a palindrome (2583648463852).

The spelling of 1240424223431 in words is "one trillion, two hundred forty billion, four hundred twenty-four million, two hundred twenty-three thousand, four hundred thirty-one".