231355441 has 4 divisors (see below), whose sum is σ = 235720692. Its totient is φ = 226990192.

The previous prime is 231355427. The next prime is 231355447. The reversal of 231355441 is 144553132.

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 130051216 + 101304225 = 11404^2 + 10065^2 .

It is a cyclic number.

It is not a de Polignac number, because 231355441 - 2¹⁷ = 231224369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231355447) 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 3 ways as a sum of consecutive naturals, for example, 2182546 + ... + 2182651.

It is an arithmetic number, because the mean of its divisors is an integer number (58930173).

Almost surely, 2^231355441 is an apocalyptic number.

It is an amenable number.

231355441 is a deficient number, since it is larger than the sum of its proper divisors (4365251).

231355441 is an equidigital number, since it uses as much as digits as its factorization.

231355441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365250.

The product of its digits is 7200, while the sum is 28.

The square root of 231355441 is about 15210.3728093693. The cubic root of 231355441 is about 613.8937886360.

The spelling of 231355441 in words is "two hundred thirty-one million, three hundred fifty-five thousand, four hundred forty-one".