231771172 has 6 divisors (see below), whose sum is σ = 405599558. Its totient is φ = 115885584.

The previous prime is 231771151. The next prime is 231771181. The reversal of 231771172 is 271177132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 116294656 + 115476516 = 10784^2 + 10746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28971393 + ... + 28971400.

Almost surely, 2^231771172 is an apocalyptic number.

It is an amenable number.

231771172 is a deficient number, since it is larger than the sum of its proper divisors (173828386).

231771172 is a wasteful number, since it uses less digits than its factorization.

231771172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57942797 (or 57942795 counting only the distinct ones).

The product of its digits is 4116, while the sum is 31.

The square root of 231771172 is about 15224.0327114730. The cubic root of 231771172 is about 614.2612779586.

The spelling of 231771172 in words is "two hundred thirty-one million, seven hundred seventy-one thousand, one hundred seventy-two".