231441681 has 8 divisors (see below), whose sum is σ = 308667744. Its totient is φ = 154255040.

The previous prime is 231441673. The next prime is 231441701. The reversal of 231441681 is 186144132.

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 231441681 - 2³ = 231441673 is a prime.

It is a super-2 number, since 2×231441681² = 107130503408211522, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231441631) 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 7 ways as a sum of consecutive naturals, for example, 9001 + ... + 23321.

It is an arithmetic number, because the mean of its divisors is an integer number (38583468).

Almost surely, 2^231441681 is an apocalyptic number.

It is an amenable number.

231441681 is a deficient number, since it is larger than the sum of its proper divisors (77226063).

231441681 is a wasteful number, since it uses less digits than its factorization.

231441681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19711.

The product of its digits is 4608, while the sum is 30.

The square root of 231441681 is about 15213.2074527366. The cubic root of 231441681 is about 613.9700574618.

The spelling of 231441681 in words is "two hundred thirty-one million, four hundred forty-one thousand, six hundred eighty-one".