240404431331 has 16 divisors (see below), whose sum is σ = 249629721600. Its totient is φ = 231336816480.

The previous prime is 240404431321. The next prime is 240404431339. The reversal of 240404431331 is 133134404042.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240404431331 is a prime.

It is a super-2 number, since 2×240404431331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240404431294 and 240404431303.

It is not an unprimeable number, because it can be changed into a prime (240404431339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1131866 + ... + 1327376.

It is an arithmetic number, because the mean of its divisors is an integer number (15601857600).

Almost surely, 2^240404431331 is an apocalyptic number.

240404431331 is a deficient number, since it is larger than the sum of its proper divisors (9225290269).

240404431331 is a wasteful number, since it uses less digits than its factorization.

240404431331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195914.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 240404431331 its reverse (133134404042), we get a palindrome (373538835373).

The spelling of 240404431331 in words is "two hundred forty billion, four hundred four million, four hundred thirty-one thousand, three hundred thirty-one".