231131441 has 4 divisors (see below), whose sum is σ = 234581232. Its totient is φ = 227681652.

The previous prime is 231131429. The next prime is 231131471. The reversal of 231131441 is 144131132.

231131441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231131441 - 2⁶ = 231131377 is a prime.

It is a super-3 number, since 3×231131441³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231131401) 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, 1724795 + ... + 1724928.

It is an arithmetic number, because the mean of its divisors is an integer number (58645308).

Almost surely, 2^231131441 is an apocalyptic number.

It is an amenable number.

231131441 is a deficient number, since it is larger than the sum of its proper divisors (3449791).

231131441 is an equidigital number, since it uses as much as digits as its factorization.

231131441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449790.

The product of its digits is 288, while the sum is 20.

The square root of 231131441 is about 15203.0076300711. The cubic root of 231131441 is about 613.6955992007.

Adding to 231131441 its reverse (144131132), we get a palindrome (375262573).

The spelling of 231131441 in words is "two hundred thirty-one million, one hundred thirty-one thousand, four hundred forty-one".