243340200651 has 4 divisors (see below), whose sum is σ = 324453600872. Its totient is φ = 162226800432.

The previous prime is 243340200647. The next prime is 243340200659. The reversal of 243340200651 is 156002043342.

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

It is not a de Polignac number, because 243340200651 - 2² = 243340200647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243340200659) 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, 40556700106 + ... + 40556700111.

It is an arithmetic number, because the mean of its divisors is an integer number (81113400218).

Almost surely, 2^243340200651 is an apocalyptic number.

243340200651 is a deficient number, since it is larger than the sum of its proper divisors (81113400221).

243340200651 is an equidigital number, since it uses as much as digits as its factorization.

243340200651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81113400220.

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

Adding to 243340200651 its reverse (156002043342), we get a palindrome (399342243993).

The spelling of 243340200651 in words is "two hundred forty-three billion, three hundred forty million, two hundred thousand, six hundred fifty-one".