231534123 has 32 divisors (see below), whose sum is σ = 334886400. Its totient is φ = 141901056.

The previous prime is 231534119. The next prime is 231534131. The reversal of 231534123 is 321435132.

It is not a de Polignac number, because 231534123 - 2² = 231534119 is a prime.

It is a super-2 number, since 2×231534123² = 107216100226758258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231534093 and 231534102.

It is not an unprimeable number, because it can be changed into a prime (231534103) 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 31 ways as a sum of consecutive naturals, for example, 226708 + ... + 227726.

It is an arithmetic number, because the mean of its divisors is an integer number (10465200).

Almost surely, 2^231534123 is an apocalyptic number.

231534123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231534123 is a deficient number, since it is larger than the sum of its proper divisors (103352277).

231534123 is a wasteful number, since it uses less digits than its factorization.

231534123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its digits is 2160, while the sum is 24.

The square root of 231534123 is about 15216.2453647409. The cubic root of 231534123 is about 614.0517901686.

Adding to 231534123 its reverse (321435132), we get a palindrome (552969255).

The spelling of 231534123 in words is "two hundred thirty-one million, five hundred thirty-four thousand, one hundred twenty-three".