231726161 has 4 divisors (see below), whose sum is σ = 232045632. Its totient is φ = 231406692.

The previous prime is 231726139. The next prime is 231726181. The reversal of 231726161 is 161627132.

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-231726161 is a prime.

It is a super-3 number, since 3×231726161³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231726101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158645 + ... + 160098.

It is an arithmetic number, because the mean of its divisors is an integer number (58011408).

Almost surely, 2^231726161 is an apocalyptic number.

It is an amenable number.

231726161 is a deficient number, since it is larger than the sum of its proper divisors (319471).

231726161 is an equidigital number, since it uses as much as digits as its factorization.

231726161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319470.

The product of its digits is 3024, while the sum is 29.

The square root of 231726161 is about 15222.5543520133. The cubic root of 231726161 is about 614.2215112868.

The spelling of 231726161 in words is "two hundred thirty-one million, seven hundred twenty-six thousand, one hundred sixty-one".