243145131500 has 48 divisors (see below), whose sum is σ = 531077129856. Its totient is φ = 97249232000.

The previous prime is 243145131497. The next prime is 243145131527. The reversal of 243145131500 is 5131541342.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11004464 + ... + 11026536.

It is an arithmetic number, because the mean of its divisors is an integer number (11064106872).

Almost surely, 2^243145131500 is an apocalyptic number.

243145131500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243145131500 is an abundant number, since it is smaller than the sum of its proper divisors (287931998356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243145131500 is a wasteful number, since it uses less digits than its factorization.

243145131500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44123 (or 44111 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 243145131500 its reverse (5131541342), we get a palindrome (248276672842).

The spelling of 243145131500 in words is "two hundred forty-three billion, one hundred forty-five million, one hundred thirty-one thousand, five hundred".