243125554579 has 2 divisors, whose sum is σ = 243125554580. Its totient is φ = 243125554578.

The previous prime is 243125554537. The next prime is 243125554589. The reversal of 243125554579 is 975455521342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243125554579 is a prime.

It is a super-2 number, since 2×243125554579² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243125554589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121562777289 + 121562777290.

It is an arithmetic number, because the mean of its divisors is an integer number (121562777290).

Almost surely, 2^243125554579 is an apocalyptic number.

243125554579 is a deficient number, since it is larger than the sum of its proper divisors (1).

243125554579 is an equidigital number, since it uses as much as digits as its factorization.

243125554579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560000, while the sum is 52.

The spelling of 243125554579 in words is "two hundred forty-three billion, one hundred twenty-five million, five hundred fifty-four thousand, five hundred seventy-nine".