423042221523 has 16 divisors (see below), whose sum is σ = 566892592416. Its totient is φ = 280613498880.

The previous prime is 423042221513. The next prime is 423042221527. The reversal of 423042221523 is 325122240324.

It is not a de Polignac number, because 423042221523 - 2¹⁷ = 423042090451 is a prime.

It is a super-2 number, since 2×423042221523² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423042221527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46903 + ... + 921023.

It is an arithmetic number, because the mean of its divisors is an integer number (35430787026).

Almost surely, 2^423042221523 is an apocalyptic number.

423042221523 is a deficient number, since it is larger than the sum of its proper divisors (143850370893).

423042221523 is a wasteful number, since it uses less digits than its factorization.

423042221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874934.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 423042221523 its reverse (325122240324), we get a palindrome (748164461847).

The spelling of 423042221523 in words is "four hundred twenty-three billion, forty-two million, two hundred twenty-one thousand, five hundred twenty-three".