240012431 has 2 divisors, whose sum is σ = 240012432. Its totient is φ = 240012430.

The previous prime is 240012419. The next prime is 240012457. The reversal of 240012431 is 134210042.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240012431 is a prime.

It is a super-2 number, since 2×240012431² = 115211934069059522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240012131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120006215 + 120006216.

It is an arithmetic number, because the mean of its divisors is an integer number (120006216).

Almost surely, 2^240012431 is an apocalyptic number.

240012431 is a deficient number, since it is larger than the sum of its proper divisors (1).

240012431 is an equidigital number, since it uses as much as digits as its factorization.

240012431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 240012431 is about 15492.3345884344. The cubic root of 240012431 is about 621.4572304520.

Adding to 240012431 its reverse (134210042), we get a palindrome (374222473).

The spelling of 240012431 in words is "two hundred forty million, twelve thousand, four hundred thirty-one".