243131042 has 48 divisors (see below), whose sum is σ = 490066848. Its totient is φ = 89147520.

The previous prime is 243131039. The next prime is 243131069. The reversal of 243131042 is 240131342.

It is a super-2 number, since 2×243131042² = 118225407168011528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11693 + ... + 24959.

It is an arithmetic number, because the mean of its divisors is an integer number (10209726).

Almost surely, 2^243131042 is an apocalyptic number.

243131042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243131042 is an abundant number, since it is smaller than the sum of its proper divisors (246935806).

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

243131042 is a wasteful number, since it uses less digits than its factorization.

243131042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13311 (or 13304 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243131042 is about 15592.6598757236. The cubic root of 243131042 is about 624.1372989162.

Adding to 243131042 its reverse (240131342), we get a palindrome (483262384).

The spelling of 243131042 in words is "two hundred forty-three million, one hundred thirty-one thousand, forty-two".