231716161 has 4 divisors (see below), whose sum is σ = 231826432. Its totient is φ = 231605892.

The previous prime is 231716141. The next prime is 231716167. The reversal of 231716161 is 161617132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231716161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231716167) 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, 51921 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (57956608).

Almost surely, 2^231716161 is an apocalyptic number.

It is an amenable number.

231716161 is a deficient number, since it is larger than the sum of its proper divisors (110271).

231716161 is a wasteful number, since it uses less digits than its factorization.

231716161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110270.

The product of its digits is 1512, while the sum is 28.

The square root of 231716161 is about 15222.2258884829. The cubic root of 231716161 is about 614.2126757092.

The spelling of 231716161 in words is "two hundred thirty-one million, seven hundred sixteen thousand, one hundred sixty-one".