231271764 has 12 divisors (see below), whose sum is σ = 539634144. Its totient is φ = 77090584.

The previous prime is 231271717. The next prime is 231271769. The reversal of 231271764 is 467172132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231271769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9636312 + ... + 9636335.

It is an arithmetic number, because the mean of its divisors is an integer number (44969512).

Almost surely, 2^231271764 is an apocalyptic number.

It is an amenable number.

231271764 is an abundant number, since it is smaller than the sum of its proper divisors (308362380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231271764 is a wasteful number, since it uses less digits than its factorization.

231271764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19272654 (or 19272652 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 231271764 is about 15207.6219048213. The cubic root of 231271764 is about 613.8197683542.

The spelling of 231271764 in words is "two hundred thirty-one million, two hundred seventy-one thousand, seven hundred sixty-four".