240861097931 has 2 divisors, whose sum is σ = 240861097932. Its totient is φ = 240861097930.

The previous prime is 240861097879. The next prime is 240861097949. The reversal of 240861097931 is 139790168042.

240861097931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240861097931 is a prime.

It is a super-2 number, since 2×240861097931² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240861097931.

It is not a weakly prime, because it can be changed into another prime (240861097951) 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, 120430548965 + 120430548966.

It is an arithmetic number, because the mean of its divisors is an integer number (120430548966).

Almost surely, 2^240861097931 is an apocalyptic number.

240861097931 is a deficient number, since it is larger than the sum of its proper divisors (1).

240861097931 is an equidigital number, since it uses as much as digits as its factorization.

240861097931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 240861097931 in words is "two hundred forty billion, eight hundred sixty-one million, ninety-seven thousand, nine hundred thirty-one".