231154164 has 36 divisors (see below), whose sum is σ = 585260676. Its totient is φ = 76925568.

The previous prime is 231154141. The next prime is 231154169. The reversal of 231154164 is 461451132.

It is a happy number.

231154164 is a `hidden beast` number, since 231 + 15 + 416 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 85710564 + 145443600 = 9258^2 + 12060^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231154169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18592 + ... + 28424.

It is an arithmetic number, because the mean of its divisors is an integer number (16257241).

Almost surely, 2^231154164 is an apocalyptic number.

It is an amenable number.

231154164 is an abundant number, since it is smaller than the sum of its proper divisors (354106512).

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

231154164 is a wasteful number, since it uses less digits than its factorization.

231154164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496 (or 10491 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 231154164 is about 15203.7549309373. The cubic root of 231154164 is about 613.7157097607.

The spelling of 231154164 in words is "two hundred thirty-one million, one hundred fifty-four thousand, one hundred sixty-four".