123230815523 has 4 divisors (see below), whose sum is σ = 123253117200. Its totient is φ = 123208513848.

The previous prime is 123230815459. The next prime is 123230815537. The reversal of 123230815523 is 325518032321.

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 123230815523 - 2⁶ = 123230815459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123230811523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11142548 + ... + 11153601.

It is an arithmetic number, because the mean of its divisors is an integer number (30813279300).

Almost surely, 2^123230815523 is an apocalyptic number.

123230815523 is a deficient number, since it is larger than the sum of its proper divisors (22301677).

123230815523 is an equidigital number, since it uses as much as digits as its factorization.

123230815523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22301676.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 123230815523 its reverse (325518032321), we get a palindrome (448748847844).

The spelling of 123230815523 in words is "one hundred twenty-three billion, two hundred thirty million, eight hundred fifteen thousand, five hundred twenty-three".