243400040515 has 8 divisors (see below), whose sum is σ = 293119481088. Its totient is φ = 194027077440.

The previous prime is 243400040483. The next prime is 243400040519. The reversal of 243400040515 is 515040004342.

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

It is not a de Polignac number, because 243400040515 - 2⁵ = 243400040483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243400040519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86617827 + ... + 86620636.

It is an arithmetic number, because the mean of its divisors is an integer number (36639935136).

Almost surely, 2^243400040515 is an apocalyptic number.

243400040515 is a deficient number, since it is larger than the sum of its proper divisors (49719440573).

243400040515 is a wasteful number, since it uses less digits than its factorization.

243400040515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173238749.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 243400040515 its reverse (515040004342), we get a palindrome (758440044857).

The spelling of 243400040515 in words is "two hundred forty-three billion, four hundred million, forty thousand, five hundred fifteen".