231123000 has 64 divisors (see below), whose sum is σ = 721113120. Its totient is φ = 61632000.

The previous prime is 231122981. The next prime is 231123031. The reversal of 231123000 is 321132.

It is a happy number.

It is a super-2 number, since 2×231123000² = 106835682258000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35521 + ... + 41520.

Almost surely, 2^231123000 is an apocalyptic number.

231123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231123000 is an abundant number, since it is smaller than the sum of its proper divisors (489990120).

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

231123000 is a wasteful number, since it uses less digits than its factorization.

231123000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77065 (or 77051 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231123000 is about 15202.7300179935. The cubic root of 231123000 is about 613.6881283180.

Adding to 231123000 its reverse (321132), we get a palindrome (231444132).

The spelling of 231123000 in words is "two hundred thirty-one million, one hundred twenty-three thousand".