242431503991 has 2 divisors, whose sum is σ = 242431503992. Its totient is φ = 242431503990.

The previous prime is 242431503971. The next prime is 242431504061. The reversal of 242431503991 is 199305134242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242431503991 - 2⁵ = 242431503959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242431503901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121215751995 + 121215751996.

It is an arithmetic number, because the mean of its divisors is an integer number (121215751996).

Almost surely, 2^242431503991 is an apocalyptic number.

242431503991 is a deficient number, since it is larger than the sum of its proper divisors (1).

242431503991 is an equidigital number, since it uses as much as digits as its factorization.

242431503991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 242431503991 in words is "two hundred forty-two billion, four hundred thirty-one million, five hundred three thousand, nine hundred ninety-one".