243145352554 has 16 divisors (see below), whose sum is σ = 393113963592. Its totient is φ = 112123588608.

The previous prime is 243145352519. The next prime is 243145352591. The reversal of 243145352554 is 455253541342.

It can be written as a sum of positive squares in 4 ways, for example, as 221808031225 + 21337321329 = 470965^2 + 146073^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243145352554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4025419 + ... + 4085374.

Almost surely, 2^243145352554 is an apocalyptic number.

243145352554 is a deficient number, since it is larger than the sum of its proper divisors (149968611038).

243145352554 is a wasteful number, since it uses less digits than its factorization.

243145352554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111961.

The product of its digits is 1440000, while the sum is 43.

Adding to 243145352554 its reverse (455253541342), we get a palindrome (698398893896).

The spelling of 243145352554 in words is "two hundred forty-three billion, one hundred forty-five million, three hundred fifty-two thousand, five hundred fifty-four".