231410561 has 4 divisors (see below), whose sum is σ = 235776852. Its totient is φ = 227044272.

The previous prime is 231410539. The next prime is 231410573. The reversal of 231410561 is 165014132.

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 111091600 + 120318961 = 10540^2 + 10969^2 .

It is a cyclic number.

It is not a de Polignac number, because 231410561 - 2⁶ = 231410497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231410461) 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, 2183066 + ... + 2183171.

It is an arithmetic number, because the mean of its divisors is an integer number (58944213).

Almost surely, 2^231410561 is an apocalyptic number.

It is an amenable number.

231410561 is a deficient number, since it is larger than the sum of its proper divisors (4366291).

231410561 is an equidigital number, since it uses as much as digits as its factorization.

231410561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366290.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 231410561 is about 15212.1846228607. The cubic root of 231410561 is about 613.9425377794.

Adding to 231410561 its reverse (165014132), we get a palindrome (396424693).

The spelling of 231410561 in words is "two hundred thirty-one million, four hundred ten thousand, five hundred sixty-one".