243534555233 has 2 divisors, whose sum is σ = 243534555234. Its totient is φ = 243534555232.

The previous prime is 243534555197. The next prime is 243534555247. The reversal of 243534555233 is 332555435342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187967336704 + 55567218529 = 433552^2 + 235727^2 .

It is a cyclic number.

It is not a de Polignac number, because 243534555233 - 2¹⁰ = 243534554209 is a prime.

It is a super-3 number, since 3×243534555233³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (243534555263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121767277616 + 121767277617.

It is an arithmetic number, because the mean of its divisors is an integer number (121767277617).

Almost surely, 2^243534555233 is an apocalyptic number.

It is an amenable number.

243534555233 is a deficient number, since it is larger than the sum of its proper divisors (1).

243534555233 is an equidigital number, since it uses as much as digits as its factorization.

243534555233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 44.

The spelling of 243534555233 in words is "two hundred forty-three billion, five hundred thirty-four million, five hundred fifty-five thousand, two hundred thirty-three".