423151430523523 has 4 divisors (see below), whose sum is σ = 455701540563808. Its totient is φ = 390601320483240.

The previous prime is 423151430523473. The next prime is 423151430523623. The reversal of 423151430523523 is 325325034151324.

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 423151430523523 - 2²¹ = 423151428426371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423151430523523.

It is not an unprimeable number, because it can be changed into a prime (423151430523623) 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, 16275055020123 + ... + 16275055020148.

It is an arithmetic number, because the mean of its divisors is an integer number (113925385140952).

Almost surely, 2^{423151430523523} is an apocalyptic number.

423151430523523 is a deficient number, since it is larger than the sum of its proper divisors (32550110040285).

423151430523523 is a wasteful number, since it uses less digits than its factorization.

423151430523523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32550110040284.

The product of its (nonzero) digits is 1296000, while the sum is 43.

Adding to 423151430523523 its reverse (325325034151324), we get a palindrome (748476464674847).

The spelling of 423151430523523 in words is "four hundred twenty-three trillion, one hundred fifty-one billion, four hundred thirty million, five hundred twenty-three thousand, five hundred twenty-three".