243131545504 has 24 divisors (see below), whose sum is σ = 480085623108. Its totient is φ = 121205038080.

The previous prime is 243131545483. The next prime is 243131545519. The reversal of 243131545504 is 405545131342.

It can be written as a sum of positive squares in 2 ways, for example, as 240935685904 + 2195859600 = 490852^2 + 46860^2 .

It is a super-2 number, since 2×243131545504² (a number of 24 digits) contains 22 as substring.

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, 11262007 + ... + 11283574.

Almost surely, 2^243131545504 is an apocalyptic number.

It is an amenable number.

243131545504 is a deficient number, since it is larger than the sum of its proper divisors (236954077604).

243131545504 is a wasteful number, since it uses less digits than its factorization.

243131545504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22545928 (or 22545920 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 243131545504 its reverse (405545131342), we get a palindrome (648676676846).

The spelling of 243131545504 in words is "two hundred forty-three billion, one hundred thirty-one million, five hundred forty-five thousand, five hundred four".