231766164 has 96 divisors (see below), whose sum is σ = 693047040. Its totient is φ = 65608704.

The previous prime is 231766163. The next prime is 231766169. The reversal of 231766164 is 461667132.

It is a happy number.

231766164 is a `hidden beast` number, since 2 + 31 + 7 + 6 + 616 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231766163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84072 + ... + 86784.

It is an arithmetic number, because the mean of its divisors is an integer number (7219240).

Almost surely, 2^231766164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231766164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346523520).

231766164 is an abundant number, since it is smaller than the sum of its proper divisors (461280876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231766164 is a wasteful number, since it uses less digits than its factorization.

231766164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846 (or 2838 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 231766164 is about 15223.8682337966. The cubic root of 231766164 is about 614.2568537060.

The spelling of 231766164 in words is "two hundred thirty-one million, seven hundred sixty-six thousand, one hundred sixty-four".