243540412 has 6 divisors (see below), whose sum is σ = 426195728. Its totient is φ = 121770204.

The previous prime is 243540403. The next prime is 243540439. The reversal of 243540412 is 214045342.

It is a happy number.

It is a super-3 number, since 3×243540412³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30442548 + ... + 30442555.

Almost surely, 2^243540412 is an apocalyptic number.

It is an amenable number.

243540412 is a deficient number, since it is larger than the sum of its proper divisors (182655316).

243540412 is a wasteful number, since it uses less digits than its factorization.

243540412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60885107 (or 60885105 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 243540412 is about 15605.7813646097. The cubic root of 243540412 is about 624.4873979375.

Adding to 243540412 its reverse (214045342), we get a palindrome (457585754).

The spelling of 243540412 in words is "two hundred forty-three million, five hundred forty thousand, four hundred twelve".