123553004221523 has 4 divisors (see below), whose sum is σ = 123557231030688. Its totient is φ = 123548777412360.

The previous prime is 123553004221519. The next prime is 123553004221547. The reversal of 123553004221523 is 325122400355321.

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 123553004221523 - 2² = 123553004221519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123553004271523) 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, 2113360736 + ... + 2113419197.

It is an arithmetic number, because the mean of its divisors is an integer number (30889307757672).

Almost surely, 2^{123553004221523} is an apocalyptic number.

123553004221523 is a deficient number, since it is larger than the sum of its proper divisors (4226809165).

123553004221523 is an equidigital number, since it uses as much as digits as its factorization.

123553004221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226809164.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 123553004221523 its reverse (325122400355321), we get a palindrome (448675404576844).

The spelling of 123553004221523 in words is "one hundred twenty-three trillion, five hundred fifty-three billion, four million, two hundred twenty-one thousand, five hundred twenty-three".