243145256451 has 16 divisors (see below), whose sum is σ = 325697783040. Its totient is φ = 161345628000.

The previous prime is 243145256407. The next prime is 243145256461. The reversal of 243145256451 is 154652541342.

It is not a de Polignac number, because 243145256451 - 2⁹ = 243145255939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243145256461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057245 + ... + 1266513.

It is an arithmetic number, because the mean of its divisors is an integer number (20356111440).

Almost surely, 2^243145256451 is an apocalyptic number.

243145256451 is a deficient number, since it is larger than the sum of its proper divisors (82552526589).

243145256451 is a wasteful number, since it uses less digits than its factorization.

243145256451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211066.

The product of its digits is 576000, while the sum is 42.

Adding to 243145256451 its reverse (154652541342), we get a palindrome (397797797793).

The spelling of 243145256451 in words is "two hundred forty-three billion, one hundred forty-five million, two hundred fifty-six thousand, four hundred fifty-one".