615243243 has 8 divisors (see below), whose sum is σ = 868578768. Its totient is φ = 386034944.

The previous prime is 615243191. The next prime is 615243247. The reversal of 615243243 is 342342516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 615243243 - 2¹⁰ = 615242219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615243243.

It is not an unprimeable number, because it can be changed into a prime (615243247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6031746 + ... + 6031847.

It is an arithmetic number, because the mean of its divisors is an integer number (108572346).

Almost surely, 2^615243243 is an apocalyptic number.

615243243 is a deficient number, since it is larger than the sum of its proper divisors (253335525).

615243243 is a wasteful number, since it uses less digits than its factorization.

615243243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12063613.

The product of its digits is 17280, while the sum is 30.

The square root of 615243243 is about 24804.0973026635. The cubic root of 615243243 is about 850.5156009043.

Adding to 615243243 its reverse (342342516), we get a palindrome (957585759).

The spelling of 615243243 in words is "six hundred fifteen million, two hundred forty-three thousand, two hundred forty-three".