243145256450 has 24 divisors (see below), whose sum is σ = 452280131460. Its totient is φ = 97251660800.

The previous prime is 243145256407. The next prime is 243145256461. The reversal of 243145256450 is 54652541342.

It can be written as a sum of positive squares in 6 ways, for example, as 221169862369 + 21975394081 = 470287^2 + 148241^2 .

It is a super-3 number, since 3×243145256450³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243145256398 and 243145256407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 640946 + ... + 947154.

Almost surely, 2^243145256450 is an apocalyptic number.

243145256450 is a deficient number, since it is larger than the sum of its proper divisors (209134875010).

243145256450 is a wasteful number, since it uses less digits than its factorization.

243145256450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322102 (or 322097 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 243145256450 its reverse (54652541342), we get a palindrome (297797797792).

The spelling of 243145256450 in words is "two hundred forty-three billion, one hundred forty-five million, two hundred fifty-six thousand, four hundred fifty".