243511040 has 36 divisors (see below), whose sum is σ = 583288104. Its totient is φ = 97403904.

The previous prime is 243511033. The next prime is 243511069. The reversal of 243511040 is 40115342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93842 + ... + 96401.

Almost surely, 2^243511040 is an apocalyptic number.

243511040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243511040 is an abundant number, since it is smaller than the sum of its proper divisors (339777064).

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

243511040 is an equidigital number, since it uses as much as digits as its factorization.

243511040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190264 (or 190250 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 243511040 is about 15604.8402747353. The cubic root of 243511040 is about 624.4622916576.

Adding to 243511040 its reverse (40115342), we get a palindrome (283626382).

The spelling of 243511040 in words is "two hundred forty-three million, five hundred eleven thousand, forty".