12451424431 has 4 divisors (see below), whose sum is σ = 12451746600. Its totient is φ = 12451102264.

The previous prime is 12451424407. The next prime is 12451424449. The reversal of 12451424431 is 13442415421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13442415421 = 73 ⋅184142677.

It is a cyclic number.

It is not a de Polignac number, because 12451424431 - 2¹¹ = 12451422383 is a prime.

It is a super-2 number, since 2×12451424431² (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 = 12451424393 and 12451424402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12451824431) 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, 93721 + ... + 183538.

It is an arithmetic number, because the mean of its divisors is an integer number (3112936650).

Almost surely, 2^12451424431 is an apocalyptic number.

12451424431 is a deficient number, since it is larger than the sum of its proper divisors (322169).

12451424431 is an equidigital number, since it uses as much as digits as its factorization.

12451424431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322168.

The product of its digits is 15360, while the sum is 31.

Adding to 12451424431 its reverse (13442415421), we get a palindrome (25893839852).

The spelling of 12451424431 in words is "twelve billion, four hundred fifty-one million, four hundred twenty-four thousand, four hundred thirty-one".