231204108111581 has 8 divisors (see below), whose sum is σ = 252234578366400. Its totient is φ = 210175623685440.

The previous prime is 231204108111569. The next prime is 231204108111583. The reversal of 231204108111581 is 185111801402132.

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 231204108111581 - 2²² = 231204103917277 is a prime.

It is a super-2 number, since 2×231204108111581² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231204108111583) 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, 496213721 + ... + 496679438.

It is an arithmetic number, because the mean of its divisors is an integer number (31529322295800).

Almost surely, 2^{231204108111581} is an apocalyptic number.

It is an amenable number.

231204108111581 is a deficient number, since it is larger than the sum of its proper divisors (21030470254819).

231204108111581 is a wasteful number, since it uses less digits than its factorization.

231204108111581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992914339.

The product of its (nonzero) digits is 15360, while the sum is 38.

The spelling of 231204108111581 in words is "two hundred thirty-one trillion, two hundred four billion, one hundred eight million, one hundred eleven thousand, five hundred eighty-one".