231135441 has 12 divisors (see below), whose sum is σ = 322164528. Its totient is φ = 147389704.

The previous prime is 231135433. The next prime is 231135469. The reversal of 231135441 is 144531132.

It is a happy number.

It is not a de Polignac number, because 231135441 - 2³ = 231135433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231135431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71235 + ... + 74408.

It is an arithmetic number, because the mean of its divisors is an integer number (26847044).

Almost surely, 2^231135441 is an apocalyptic number.

It is an amenable number.

231135441 is a deficient number, since it is larger than the sum of its proper divisors (91029087).

231135441 is a wasteful number, since it uses less digits than its factorization.

231135441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145692 (or 145669 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 231135441 is about 15203.1391824189. The cubic root of 231135441 is about 613.6991394204.

Adding to 231135441 its reverse (144531132), we get a palindrome (375666573).

The spelling of 231135441 in words is "two hundred thirty-one million, one hundred thirty-five thousand, four hundred forty-one".