243561522 has 8 divisors (see below), whose sum is σ = 487123056. Its totient is φ = 81187172.

The previous prime is 243561497. The next prime is 243561529. The reversal of 243561522 is 225165342.

It is a sphenic number, since it is the product of 3 distinct primes.

243561522 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 243561522.

It is not an unprimeable number, because it can be changed into a prime (243561529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20296788 + ... + 20296799.

It is an arithmetic number, because the mean of its divisors is an integer number (60890382).

Almost surely, 2^243561522 is an apocalyptic number.

243561522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

243561522 is a wasteful number, since it uses less digits than its factorization.

243561522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40593592.

The product of its digits is 14400, while the sum is 30.

The square root of 243561522 is about 15606.4577018618. The cubic root of 243561522 is about 624.5054408679.

It can be divided in two parts, 24356 and 1522, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 243561522 in words is "two hundred forty-three million, five hundred sixty-one thousand, five hundred twenty-two".