243228015 has 40 divisors (see below), whose sum is σ = 450096768. Its totient is φ = 125530560.

The previous prime is 243227989. The next prime is 243228053. The reversal of 243228015 is 510822342.

It is not a de Polignac number, because 243228015 - 2⁵ = 243227983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 243228015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2869 + ... + 22241.

Almost surely, 2^243228015 is an apocalyptic number.

243228015 is a deficient number, since it is larger than the sum of its proper divisors (206868753).

243228015 is a wasteful number, since it uses less digits than its factorization.

243228015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19421 (or 19412 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 243228015 is about 15595.7691378143. The cubic root of 243228015 is about 624.2202670978.

The spelling of 243228015 in words is "two hundred forty-three million, two hundred twenty-eight thousand, fifteen".