243040335011 has 4 divisors (see below), whose sum is σ = 249608992752. Its totient is φ = 236471677272.

The previous prime is 243040334989. The next prime is 243040335037. The reversal of 243040335011 is 110533040342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243040335011 is a prime.

It is a super-2 number, since 2×243040335011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243040335511) 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, 3284328815 + ... + 3284328888.

It is an arithmetic number, because the mean of its divisors is an integer number (62402248188).

Almost surely, 2^243040335011 is an apocalyptic number.

243040335011 is a deficient number, since it is larger than the sum of its proper divisors (6568657741).

243040335011 is an equidigital number, since it uses as much as digits as its factorization.

243040335011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568657740.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 243040335011 its reverse (110533040342), we get a palindrome (353573375353).

The spelling of 243040335011 in words is "two hundred forty-three billion, forty million, three hundred thirty-five thousand, eleven".