243005306013 has 16 divisors (see below), whose sum is σ = 360863003200. Its totient is φ = 161618723280.

The previous prime is 243005305987. The next prime is 243005306023. The reversal of 243005306013 is 310603500342.

It is a happy number.

243005306013 is a `hidden beast` number, since 2 + 4 + 3 + 0 + 0 + 53 + 0 + 601 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-243005306013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243005306023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10677703 + ... + 10700436.

It is an arithmetic number, because the mean of its divisors is an integer number (22553937700).

Almost surely, 2^243005306013 is an apocalyptic number.

It is an amenable number.

243005306013 is a deficient number, since it is larger than the sum of its proper divisors (117857697187).

243005306013 is a wasteful number, since it uses less digits than its factorization.

243005306013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21378569 (or 21378563 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 243005306013 its reverse (310603500342), we get a palindrome (553608806355).

The spelling of 243005306013 in words is "two hundred forty-three billion, five million, three hundred six thousand, thirteen".