243120553015 has 8 divisors (see below), whose sum is σ = 291747330288. Its totient is φ = 194494664640.

The previous prime is 243120552977. The next prime is 243120553037. The reversal of 243120553015 is 510355021342.

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

It is a de Polignac number, because none of the positive numbers 2^k-243120553015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848524 + ... + 1098286.

It is an arithmetic number, because the mean of its divisors is an integer number (36468416286).

Almost surely, 2^243120553015 is an apocalyptic number.

243120553015 is a deficient number, since it is larger than the sum of its proper divisors (48626777273).

243120553015 is a wasteful number, since it uses less digits than its factorization.

243120553015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444449.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 243120553015 its reverse (510355021342), we get a palindrome (753475574357).

The spelling of 243120553015 in words is "two hundred forty-three billion, one hundred twenty million, five hundred fifty-three thousand, fifteen".