12523442431 has 8 divisors (see below), whose sum is σ = 13755726720. Its totient is φ = 11348473752.

The previous prime is 12523442419. The next prime is 12523442453. The reversal of 12523442431 is 13424432521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12523442431 - 2⁷ = 12523442303 is a prime.

It is a super-2 number, since 2×12523442431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12523442393 and 12523442402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523442461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14328445 + ... + 14329318.

It is an arithmetic number, because the mean of its divisors is an integer number (1719465840).

Almost surely, 2^12523442431 is an apocalyptic number.

12523442431 is a deficient number, since it is larger than the sum of its proper divisors (1232284289).

12523442431 is a wasteful number, since it uses less digits than its factorization.

12523442431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28657805.

The product of its digits is 23040, while the sum is 31.

Adding to 12523442431 its reverse (13424432521), we get a palindrome (25947874952).

The spelling of 12523442431 in words is "twelve billion, five hundred twenty-three million, four hundred forty-two thousand, four hundred thirty-one".