240343431431 has 4 divisors (see below), whose sum is σ = 240731709000. Its totient is φ = 239955153864.

The previous prime is 240343431401. The next prime is 240343431439. The reversal of 240343431431 is 134134343042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240343431431 - 2¹⁴ = 240343415047 is a prime.

It is a super-2 number, since 2×240343431431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240343431439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194137856 + ... + 194139093.

It is an arithmetic number, because the mean of its divisors is an integer number (60182927250).

Almost surely, 2^240343431431 is an apocalyptic number.

240343431431 is a deficient number, since it is larger than the sum of its proper divisors (388277569).

240343431431 is an equidigital number, since it uses as much as digits as its factorization.

240343431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388277568.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 240343431431 its reverse (134134343042), we get a palindrome (374477774473).

The spelling of 240343431431 in words is "two hundred forty billion, three hundred forty-three million, four hundred thirty-one thousand, four hundred thirty-one".