243515345459 has 2 divisors, whose sum is σ = 243515345460. Its totient is φ = 243515345458.

The previous prime is 243515345371. The next prime is 243515345471. The reversal of 243515345459 is 954543515342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243515345459 is a prime.

It is a super-2 number, since 2×243515345459² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243515375459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121757672729 + 121757672730.

It is an arithmetic number, because the mean of its divisors is an integer number (121757672730).

Almost surely, 2^243515345459 is an apocalyptic number.

243515345459 is a deficient number, since it is larger than the sum of its proper divisors (1).

243515345459 is an equidigital number, since it uses as much as digits as its factorization.

243515345459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480000, while the sum is 50.

The spelling of 243515345459 in words is "two hundred forty-three billion, five hundred fifteen million, three hundred forty-five thousand, four hundred fifty-nine".