231172671 has 4 divisors (see below), whose sum is σ = 308230232. Its totient is φ = 154115112.

The previous prime is 231172661. The next prime is 231172691. The reversal of 231172671 is 176271132.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-231172671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231172621) 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, 38528776 + ... + 38528781.

It is an arithmetic number, because the mean of its divisors is an integer number (77057558).

Almost surely, 2^231172671 is an apocalyptic number.

231172671 is a deficient number, since it is larger than the sum of its proper divisors (77057561).

231172671 is an equidigital number, since it uses as much as digits as its factorization.

231172671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77057560.

The product of its digits is 3528, while the sum is 30.

The square root of 231172671 is about 15204.3635512967. The cubic root of 231172671 is about 613.7320880561.

The spelling of 231172671 in words is "two hundred thirty-one million, one hundred seventy-two thousand, six hundred seventy-one".