243130542 has 16 divisors (see below), whose sum is σ = 486525312. Its totient is φ = 80999480.

The previous prime is 243130541. The next prime is 243130553. The reversal of 243130542 is 245031342.

It is a super-2 number, since 2×243130542² = 118224920906427528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243130541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2167 + ... + 22157.

It is an arithmetic number, because the mean of its divisors is an integer number (30407832).

Almost surely, 2^243130542 is an apocalyptic number.

243130542 is an abundant number, since it is smaller than the sum of its proper divisors (243394770).

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

243130542 is a wasteful number, since it uses less digits than its factorization.

243130542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22023.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243130542 is about 15592.6438425304. The cubic root of 243130542 is about 624.1368710689.

Adding to 243130542 its reverse (245031342), we get a palindrome (488161884).

The spelling of 243130542 in words is "two hundred forty-three million, one hundred thirty thousand, five hundred forty-two".