243120454931 has 2 divisors, whose sum is σ = 243120454932. Its totient is φ = 243120454930.

The previous prime is 243120454877. The next prime is 243120454937. The reversal of 243120454931 is 139454021342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243120454931 is a prime.

It is a super-2 number, since 2×243120454931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243120454937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560227465 + 121560227466.

It is an arithmetic number, because the mean of its divisors is an integer number (121560227466).

Almost surely, 2^243120454931 is an apocalyptic number.

243120454931 is a deficient number, since it is larger than the sum of its proper divisors (1).

243120454931 is an equidigital number, since it uses as much as digits as its factorization.

243120454931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 243120454931 in words is "two hundred forty-three billion, one hundred twenty million, four hundred fifty-four thousand, nine hundred thirty-one".