231666041 has 4 divisors (see below), whose sum is σ = 233357172. Its totient is φ = 229974912.

The previous prime is 231666013. The next prime is 231666059. The reversal of 231666041 is 140666132.

It is a happy number.

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 96432400 + 135233641 = 9820^2 + 11629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231666041 is a prime.

It is a super-2 number, since 2×231666041² = 107338309105227362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231665995 and 231666013.

It is not an unprimeable number, because it can be changed into a prime (231666341) 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, 845360 + ... + 845633.

It is an arithmetic number, because the mean of its divisors is an integer number (58339293).

Almost surely, 2^231666041 is an apocalyptic number.

It is an amenable number.

231666041 is a deficient number, since it is larger than the sum of its proper divisors (1691131).

231666041 is a wasteful number, since it uses less digits than its factorization.

231666041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691130.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 231666041 is about 15220.5795224755. The cubic root of 231666041 is about 614.1683879636.

Subtracting from 231666041 its reverse (140666132), we obtain a palindrome (90999909).

The spelling of 231666041 in words is "two hundred thirty-one million, six hundred sixty-six thousand, forty-one".