231171404 has 18 divisors (see below), whose sum is σ = 426965364. Its totient is φ = 109501560.

The previous prime is 231171403. The next prime is 231171443. The reversal of 231171404 is 404171132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231171404.

It is not an unprimeable number, because it can be changed into a prime (231171403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78602 + ... + 81489.

It is an arithmetic number, because the mean of its divisors is an integer number (23720298).

Almost surely, 2^231171404 is an apocalyptic number.

It is an amenable number.

231171404 is a deficient number, since it is larger than the sum of its proper divisors (195793960).

231171404 is a wasteful number, since it uses less digits than its factorization.

231171404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160133 (or 160112 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 231171404 is about 15204.3218855692. The cubic root of 231171404 is about 613.7309668163.

The spelling of 231171404 in words is "two hundred thirty-one million, one hundred seventy-one thousand, four hundred four".