243012131 has 8 divisors (see below), whose sum is σ = 253876224. Its totient is φ = 232337160.

The previous prime is 243012113. The next prime is 243012163. The reversal of 243012131 is 131210342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243012131 - 2¹⁴ = 242995747 is a prime.

It is a super-2 number, since 2×243012131² = 118109791626322322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44651 + ... + 49796.

It is an arithmetic number, because the mean of its divisors is an integer number (31734528).

Almost surely, 2^243012131 is an apocalyptic number.

243012131 is a deficient number, since it is larger than the sum of its proper divisors (10864093).

243012131 is an equidigital number, since it uses as much as digits as its factorization.

243012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94561.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 243012131 is about 15588.8463652703. The cubic root of 243012131 is about 624.0355308979.

Adding to 243012131 its reverse (131210342), we get a palindrome (374222473).

The spelling of 243012131 in words is "two hundred forty-three million, twelve thousand, one hundred thirty-one".