231668641 has 8 divisors (see below), whose sum is σ = 232848000. Its totient is φ = 230493120.

The previous prime is 231668629. The next prime is 231668681. The reversal of 231668641 is 146866132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231668641 - 2⁵ = 231668609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231668641.

It is not an unprimeable number, because it can be changed into a prime (231668621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262521 + ... + 263401.

It is an arithmetic number, because the mean of its divisors is an integer number (29106000).

Almost surely, 2^231668641 is an apocalyptic number.

It is an amenable number.

231668641 is a deficient number, since it is larger than the sum of its proper divisors (1179359).

231668641 is an equidigital number, since it uses as much as digits as its factorization.

231668641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919.

The product of its digits is 41472, while the sum is 37.

The square root of 231668641 is about 15220.6649329128. The cubic root of 231668641 is about 614.1706855696.

The spelling of 231668641 in words is "two hundred thirty-one million, six hundred sixty-eight thousand, six hundred forty-one".