243540442 has 16 divisors (see below), whose sum is σ = 386850240. Its totient is φ = 114667488.

The previous prime is 243540439. The next prime is 243540457. The reversal of 243540442 is 244045342.

243540442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×243540442³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243540442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12843 + ... + 25534.

It is an arithmetic number, because the mean of its divisors is an integer number (24178140).

Almost surely, 2^243540442 is an apocalyptic number.

243540442 is a deficient number, since it is larger than the sum of its proper divisors (143309798).

243540442 is a wasteful number, since it uses less digits than its factorization.

243540442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38565.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 243540442 is about 15605.7823257919. The cubic root of 243540442 is about 624.4874235796.

Adding to 243540442 its reverse (244045342), we get a palindrome (487585784).

The spelling of 243540442 in words is "two hundred forty-three million, five hundred forty thousand, four hundred forty-two".