243452505 has 16 divisors (see below), whose sum is σ = 390438144. Its totient is φ = 129536640.

The previous prime is 243452501. The next prime is 243452509. The reversal of 243452505 is 505254342.

It is an interprime number because it is at equal distance from previous prime (243452501) and next prime (243452509).

It is not a de Polignac number, because 243452505 - 2² = 243452501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243452501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12364 + ... + 25293.

It is an arithmetic number, because the mean of its divisors is an integer number (24402384).

Almost surely, 2^243452505 is an apocalyptic number.

It is an amenable number.

243452505 is a deficient number, since it is larger than the sum of its proper divisors (146985639).

243452505 is a wasteful number, since it uses less digits than its factorization.

243452505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38096.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 243452505 is about 15602.9646221479. The cubic root of 243452505 is about 624.4122517231.

The spelling of 243452505 in words is "two hundred forty-three million, four hundred fifty-two thousand, five hundred five".