243130223515 has 4 divisors (see below), whose sum is σ = 291756268224. Its totient is φ = 194504178808.

The previous prime is 243130223459. The next prime is 243130223527. The reversal of 243130223515 is 515322031342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515322031342 = 2 ⋅257661015671.

It is a cyclic number.

It is not a de Polignac number, because 243130223515 - 2¹⁵ = 243130190747 is a prime.

It is a super-2 number, since 2×243130223515² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24313022347 + ... + 24313022356.

It is an arithmetic number, because the mean of its divisors is an integer number (72939067056).

Almost surely, 2^243130223515 is an apocalyptic number.

243130223515 is a deficient number, since it is larger than the sum of its proper divisors (48626044709).

243130223515 is an equidigital number, since it uses as much as digits as its factorization.

243130223515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48626044708.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 243130223515 its reverse (515322031342), we get a palindrome (758452254857).

The spelling of 243130223515 in words is "two hundred forty-three billion, one hundred thirty million, two hundred twenty-three thousand, five hundred fifteen".