240131430991 has 2 divisors, whose sum is σ = 240131430992. Its totient is φ = 240131430990.

The previous prime is 240131430919. The next prime is 240131431027. The reversal of 240131430991 is 199034131042.

It is a happy number.

Together with previous prime (240131430919) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240131430991 - 2¹⁵ = 240131398223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240131430991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240131430391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120065715495 + 120065715496.

It is an arithmetic number, because the mean of its divisors is an integer number (120065715496).

Almost surely, 2^240131430991 is an apocalyptic number.

240131430991 is a deficient number, since it is larger than the sum of its proper divisors (1).

240131430991 is an equidigital number, since it uses as much as digits as its factorization.

240131430991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 240131430991 in words is "two hundred forty billion, one hundred thirty-one million, four hundred thirty thousand, nine hundred ninety-one".