243145220337 has 32 divisors (see below), whose sum is σ = 376595865600. Its totient is φ = 154752458256.

The previous prime is 243145220333. The next prime is 243145220369. The reversal of 243145220337 is 733022541342.

243145220337 is a `hidden beast` number, since 2 + 4 + 314 + 5 + 2 + 2 + 0 + 337 = 666.

It is not a de Polignac number, because 243145220337 - 2² = 243145220333 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243145220333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49537 + ... + 699102.

It is an arithmetic number, because the mean of its divisors is an integer number (11768620800).

Almost surely, 2^243145220337 is an apocalyptic number.

243145220337 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

243145220337 is a deficient number, since it is larger than the sum of its proper divisors (133450645263).

243145220337 is a wasteful number, since it uses less digits than its factorization.

243145220337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749194 (or 749188 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

Adding to 243145220337 its reverse (733022541342), we get a palindrome (976167761679).

The spelling of 243145220337 in words is "two hundred forty-three billion, one hundred forty-five million, two hundred twenty thousand, three hundred thirty-seven".