240123431 has 2 divisors, whose sum is σ = 240123432. Its totient is φ = 240123430.

The previous prime is 240123413. The next prime is 240123437. The reversal of 240123431 is 134321042.

Together with previous prime (240123413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240123431 is a prime.

It is a super-2 number, since 2×240123431² = 115318524230423522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240123437) 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, 120061715 + 120061716.

It is an arithmetic number, because the mean of its divisors is an integer number (120061716).

Almost surely, 2^240123431 is an apocalyptic number.

240123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

240123431 is an equidigital number, since it uses as much as digits as its factorization.

240123431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 240123431 is about 15495.9165911539. The cubic root of 240123431 is about 621.5530187144.

Adding to 240123431 its reverse (134321042), we get a palindrome (374444473).

The spelling of 240123431 in words is "two hundred forty million, one hundred twenty-three thousand, four hundred thirty-one".