243023141 has 4 divisors (see below), whose sum is σ = 249591372. Its totient is φ = 236454912.

The previous prime is 243023101. The next prime is 243023147. The reversal of 243023141 is 141320342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167159041 + 75864100 = 12929^2 + 8710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243023141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243023147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3284060 + ... + 3284133.

It is an arithmetic number, because the mean of its divisors is an integer number (62397843).

Almost surely, 2^243023141 is an apocalyptic number.

It is an amenable number.

243023141 is a deficient number, since it is larger than the sum of its proper divisors (6568231).

243023141 is an equidigital number, since it uses as much as digits as its factorization.

243023141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6568230.

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

The square root of 243023141 is about 15589.1994983707. The cubic root of 243023141 is about 624.0449550192.

Adding to 243023141 its reverse (141320342), we get a palindrome (384343483).

It can be divided in two parts, 243023 and 141, that multiplied together give a palindrome (34266243).

The spelling of 243023141 in words is "two hundred forty-three million, twenty-three thousand, one hundred forty-one".