240131431081 has 2 divisors, whose sum is σ = 240131431082. Its totient is φ = 240131431080.

The previous prime is 240131431079. The next prime is 240131431091. The reversal of 240131431081 is 180134131042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155144605456 + 84986825625 = 393884^2 + 291525^2 .

It is a cyclic number.

It is not a de Polignac number, because 240131431081 - 2¹ = 240131431079 is a prime.

It is a super-2 number, since 2×240131431081² (a number of 24 digits) contains 22 as substring.

Together with 240131431079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (240131431091) 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 as a sum of consecutive naturals, namely, 120065715540 + 120065715541.

It is an arithmetic number, because the mean of its divisors is an integer number (120065715541).

Almost surely, 2^240131431081 is an apocalyptic number.

It is an amenable number.

240131431081 is a deficient number, since it is larger than the sum of its proper divisors (1).

240131431081 is an equidigital number, since it uses as much as digits as its factorization.

240131431081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 240131431081 in words is "two hundred forty billion, one hundred thirty-one million, four hundred thirty-one thousand, eighty-one".