231544141 has 4 divisors (see below), whose sum is σ = 233931292. Its totient is φ = 229156992.

The previous prime is 231544087. The next prime is 231544153. The reversal of 231544141 is 141445132.

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 175668516 + 55875625 = 13254^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 231544141 - 2¹⁵ = 231511373 is a prime.

It is a super-2 number, since 2×231544141² = 107225378462855762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231544441) 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, 1193430 + ... + 1193623.

It is an arithmetic number, because the mean of its divisors is an integer number (58482823).

Almost surely, 2^231544141 is an apocalyptic number.

It is an amenable number.

231544141 is a deficient number, since it is larger than the sum of its proper divisors (2387151).

231544141 is an equidigital number, since it uses as much as digits as its factorization.

231544141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387150.

The product of its digits is 1920, while the sum is 25.

The square root of 231544141 is about 15216.5745488267. The cubic root of 231544141 is about 614.0606462889.

Adding to 231544141 its reverse (141445132), we get a palindrome (372989273).

Subtracting from 231544141 its reverse (141445132), we obtain a palindrome (90099009).

The spelling of 231544141 in words is "two hundred thirty-one million, five hundred forty-four thousand, one hundred forty-one".