243251564 has 6 divisors (see below), whose sum is σ = 425690244. Its totient is φ = 121625780.

The previous prime is 243251563. The next prime is 243251581. The reversal of 243251564 is 465152342.

It is a self number, because there is not a number n which added to its sum of digits gives 243251564.

It is not an unprimeable number, because it can be changed into a prime (243251563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30406442 + ... + 30406449.

It is an arithmetic number, because the mean of its divisors is an integer number (70948374).

Almost surely, 2^243251564 is an apocalyptic number.

It is an amenable number.

243251564 is a deficient number, since it is larger than the sum of its proper divisors (182438680).

243251564 is a wasteful number, since it uses less digits than its factorization.

243251564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60812895 (or 60812893 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 243251564 is about 15596.5240999397. The cubic root of 243251564 is about 624.2404118286.

The spelling of 243251564 in words is "two hundred forty-three million, two hundred fifty-one thousand, five hundred sixty-four".