243225015 has 32 divisors (see below), whose sum is σ = 425246976. Its totient is φ = 117730560.

The previous prime is 243225007. The next prime is 243225019. The reversal of 243225015 is 510522342.

It is not a de Polignac number, because 243225015 - 2³ = 243225007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243225019) 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 in 31 ways as a sum of consecutive naturals, for example, 169732 + ... + 171158.

It is an arithmetic number, because the mean of its divisors is an integer number (13288968).

Almost surely, 2^243225015 is an apocalyptic number.

243225015 is a deficient number, since it is larger than the sum of its proper divisors (182021961).

243225015 is a wasteful number, since it uses less digits than its factorization.

243225015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 243225015 is about 15595.6729575867. The cubic root of 243225015 is about 624.2177006877.

Adding to 243225015 its reverse (510522342), we get a palindrome (753747357).

The spelling of 243225015 in words is "two hundred forty-three million, two hundred twenty-five thousand, fifteen".