243040413 has 32 divisors (see below), whose sum is σ = 405411840. Its totient is φ = 125818560.

The previous prime is 243040393. The next prime is 243040439. The reversal of 243040413 is 314040342.

243040413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243040413 - 2⁸ = 243040157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 243040413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243040493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71568 + ... + 74886.

It is an arithmetic number, because the mean of its divisors is an integer number (12669120).

Almost surely, 2^243040413 is an apocalyptic number.

It is an amenable number.

243040413 is a deficient number, since it is larger than the sum of its proper divisors (162371427).

243040413 is a wasteful number, since it uses less digits than its factorization.

243040413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 243040413 is about 15589.7534618095. The cubic root of 243040413 is about 624.0597385896.

Adding to 243040413 its reverse (314040342), we get a palindrome (557080755).

The spelling of 243040413 in words is "two hundred forty-three million, forty thousand, four hundred thirteen".