243215051175779 has 2 divisors, whose sum is σ = 243215051175780. Its totient is φ = 243215051175778.

The previous prime is 243215051175763. The next prime is 243215051175781. The reversal of 243215051175779 is 977571150512342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243215051175779 - 2⁴ = 243215051175763 is a prime.

It is a super-2 number, since 2×243215051175779² (a number of 30 digits) contains 22 as substring.

Together with 243215051175781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243215051175749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121607525587889 + 121607525587890.

It is an arithmetic number, because the mean of its divisors is an integer number (121607525587890).

Almost surely, 2^{243215051175779} is an apocalyptic number.

243215051175779 is a deficient number, since it is larger than the sum of its proper divisors (1).

243215051175779 is an equidigital number, since it uses as much as digits as its factorization.

243215051175779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522000, while the sum is 59.

The spelling of 243215051175779 in words is "two hundred forty-three trillion, two hundred fifteen billion, fifty-one million, one hundred seventy-five thousand, seven hundred seventy-nine".