231133160 has 16 divisors (see below), whose sum is σ = 520049700. Its totient is φ = 92453248.

The previous prime is 231133153. The next prime is 231133193. The reversal of 231133160 is 61331132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 228553924 + 2579236 = 15118^2 + 1606^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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, 2889125 + ... + 2889204.

Almost surely, 2^231133160 is an apocalyptic number.

231133160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231133160 is an abundant number, since it is smaller than the sum of its proper divisors (288916540).

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

231133160 is a wasteful number, since it uses less digits than its factorization.

231133160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778340 (or 5778336 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 231133160 is about 15203.0641648320. The cubic root of 231133160 is about 613.6971206151.

Adding to 231133160 its reverse (61331132), we get a palindrome (292464292).

The spelling of 231133160 in words is "two hundred thirty-one million, one hundred thirty-three thousand, one hundred sixty".