243243013551 has 16 divisors (see below), whose sum is σ = 325175760000. Its totient is φ = 161736543648.

The previous prime is 243243013547. The next prime is 243243013553. The reversal of 243243013551 is 155310342342.

It is not a de Polignac number, because 243243013551 - 2² = 243243013547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243013553) 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, 2400960 + ... + 2500218.

It is an arithmetic number, because the mean of its divisors is an integer number (20323485000).

Almost surely, 2^243243013551 is an apocalyptic number.

243243013551 is a deficient number, since it is larger than the sum of its proper divisors (81932746449).

243243013551 is a wasteful number, since it uses less digits than its factorization.

243243013551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101398.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 243243013551 its reverse (155310342342), we get a palindrome (398553355893).

The spelling of 243243013551 in words is "two hundred forty-three billion, two hundred forty-three million, thirteen thousand, five hundred fifty-one".