231015123 has 12 divisors (see below), whose sum is σ = 334602528. Its totient is φ = 153588240.

The previous prime is 231015121. The next prime is 231015157. The reversal of 231015123 is 321510132.

It is not a de Polignac number, because 231015123 - 2¹ = 231015121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231015096 and 231015105.

It is not an unprimeable number, because it can be changed into a prime (231015121) 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 11 ways as a sum of consecutive naturals, for example, 31668 + ... + 38273.

It is an arithmetic number, because the mean of its divisors is an integer number (27883544).

Almost surely, 2^231015123 is an apocalyptic number.

231015123 is a deficient number, since it is larger than the sum of its proper divisors (103587405).

231015123 is a wasteful number, since it uses less digits than its factorization.

231015123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70314 (or 70311 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 231015123 is about 15199.1816556024. The cubic root of 231015123 is about 613.5926335137.

Adding to 231015123 its reverse (321510132), we get a palindrome (552525255).

It can be divided in two parts, 23101 and 5123, that added together give a square (28224 = 168²).

The spelling of 231015123 in words is "two hundred thirty-one million, fifteen thousand, one hundred twenty-three".