231571065 has 16 divisors (see below), whose sum is σ = 404197056. Its totient is φ = 112276800.

The previous prime is 231571063. The next prime is 231571073. The reversal of 231571065 is 560175132.

It is not a de Polignac number, because 231571065 - 2¹ = 231571063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231571063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701566 + ... + 701895.

It is an arithmetic number, because the mean of its divisors is an integer number (25262316).

Almost surely, 2^231571065 is an apocalyptic number.

It is an amenable number.

231571065 is a deficient number, since it is larger than the sum of its proper divisors (172625991).

231571065 is a wasteful number, since it uses less digits than its factorization.

231571065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403480.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 231571065 is about 15217.4592163081. The cubic root of 231571065 is about 614.0844463988.

The spelling of 231571065 in words is "two hundred thirty-one million, five hundred seventy-one thousand, sixty-five".