243225040 has 20 divisors (see below), whose sum is σ = 565498404. Its totient is φ = 97289984.

The previous prime is 243225029. The next prime is 243225043. The reversal of 243225040 is 40522342.

It can be written as a sum of positive squares in 2 ways, for example, as 138203536 + 105021504 = 11756^2 + 10248^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243225043) 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, 1520077 + ... + 1520236.

Almost surely, 2^243225040 is an apocalyptic number.

243225040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243225040 is an abundant number, since it is smaller than the sum of its proper divisors (322273364).

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

243225040 is a wasteful number, since it uses less digits than its factorization.

243225040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040326 (or 3040320 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 243225040 is about 15595.6737590910. The cubic root of 243225040 is about 624.2177220745.

Adding to 243225040 its reverse (40522342), we get a palindrome (283747382).

It can be divided in two parts, 2432 and 25040, that added together give a palindrome (27472).

The spelling of 243225040 in words is "two hundred forty-three million, two hundred twenty-five thousand, forty".