243120400015 has 8 divisors (see below), whose sum is σ = 291754112688. Its totient is φ = 194489898240.

The previous prime is 243120400009. The next prime is 243120400031. The reversal of 243120400015 is 510004021342.

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

It is not a de Polignac number, because 243120400015 - 2²⁷ = 242986182287 is a prime.

It is a super-2 number, since 2×243120400015² (a number of 24 digits) contains 22 as substring.

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, 632877 + ... + 941686.

It is an arithmetic number, because the mean of its divisors is an integer number (36469264086).

Almost surely, 2^243120400015 is an apocalyptic number.

243120400015 is a deficient number, since it is larger than the sum of its proper divisors (48633712673).

243120400015 is a wasteful number, since it uses less digits than its factorization.

243120400015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605449.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 243120400015 its reverse (510004021342), we get a palindrome (753124421357).

The spelling of 243120400015 in words is "two hundred forty-three billion, one hundred twenty million, four hundred thousand, fifteen".