515045437243 has 4 divisors (see below), whose sum is σ = 515506535440. Its totient is φ = 514584339048.

The previous prime is 515045437241. The next prime is 515045437271. The reversal of 515045437243 is 342734540515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 515045437243 - 2¹ = 515045437241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 515045437243.

It is not an unprimeable number, because it can be changed into a prime (515045437241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230547423 + ... + 230549656.

It is an arithmetic number, because the mean of its divisors is an integer number (128876633860).

Almost surely, 2^515045437243 is an apocalyptic number.

515045437243 is a deficient number, since it is larger than the sum of its proper divisors (461098197).

515045437243 is a wasteful number, since it uses less digits than its factorization.

515045437243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461098196.

The product of its (nonzero) digits is 1008000, while the sum is 43.

Adding to 515045437243 its reverse (342734540515), we get a palindrome (857779977758).

The spelling of 515045437243 in words is "five hundred fifteen billion, forty-five million, four hundred thirty-seven thousand, two hundred forty-three".