12551054431 has 4 divisors (see below), whose sum is σ = 12552423912. Its totient is φ = 12549684952.

The previous prime is 12551054429. The next prime is 12551054443. The reversal of 12551054431 is 13445015521.

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 12551054431 - 2¹ = 12551054429 is a prime.

It is a super-2 number, since 2×12551054431² (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 = 12551054393 and 12551054402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551054531) 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 3 ways as a sum of consecutive naturals, for example, 670900 + ... + 689353.

It is an arithmetic number, because the mean of its divisors is an integer number (3138105978).

Almost surely, 2^12551054431 is an apocalyptic number.

12551054431 is a deficient number, since it is larger than the sum of its proper divisors (1369481).

12551054431 is an equidigital number, since it uses as much as digits as its factorization.

12551054431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369480.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 12551054431 its reverse (13445015521), we get a palindrome (25996069952).

The spelling of 12551054431 in words is "twelve billion, five hundred fifty-one million, fifty-four thousand, four hundred thirty-one".