123510231523 has 4 divisors (see below), whose sum is σ = 141154550320. Its totient is φ = 105865912728.

The previous prime is 123510231517. The next prime is 123510231553. The reversal of 123510231523 is 325132015321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123510231523 - 2⁵ = 123510231491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123510231491 and 123510231500.

It is not an unprimeable number, because it can be changed into a prime (123510231553) 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 3 ways as a sum of consecutive naturals, for example, 8822159388 + ... + 8822159401.

It is an arithmetic number, because the mean of its divisors is an integer number (35288637580).

Almost surely, 2^123510231523 is an apocalyptic number.

123510231523 is a deficient number, since it is larger than the sum of its proper divisors (17644318797).

123510231523 is an equidigital number, since it uses as much as digits as its factorization.

123510231523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17644318796.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 123510231523 its reverse (325132015321), we get a palindrome (448642246844).

The spelling of 123510231523 in words is "one hundred twenty-three billion, five hundred ten million, two hundred thirty-one thousand, five hundred twenty-three".