231871610809 has 8 divisors (see below), whose sum is σ = 246518137152. Its totient is φ = 217605513840.

The previous prime is 231871610783. The next prime is 231871610813. The reversal of 231871610809 is 908016178132.

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 231871610809 - 2⁷ = 231871610681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231871610819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95106087 + ... + 95108524.

It is an arithmetic number, because the mean of its divisors is an integer number (30814767144).

Almost surely, 2^231871610809 is an apocalyptic number.

It is an amenable number.

231871610809 is a deficient number, since it is larger than the sum of its proper divisors (14646526343).

231871610809 is a wasteful number, since it uses less digits than its factorization.

231871610809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190214687.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 231871610809 in words is "two hundred thirty-one billion, eight hundred seventy-one million, six hundred ten thousand, eight hundred nine".