12331406551 has 4 divisors (see below), whose sum is σ = 12337794504. Its totient is φ = 12325018600.

The previous prime is 12331406519. The next prime is 12331406557. The reversal of 12331406551 is 15560413321.

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 12331406551 - 2⁵ = 12331406519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331406557) 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, 3191080 + ... + 3194941.

It is an arithmetic number, because the mean of its divisors is an integer number (3084448626).

Almost surely, 2^12331406551 is an apocalyptic number.

12331406551 is a deficient number, since it is larger than the sum of its proper divisors (6387953).

12331406551 is an equidigital number, since it uses as much as digits as its factorization.

12331406551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387952.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 12331406551 its reverse (15560413321), we get a palindrome (27891819872).

The spelling of 12331406551 in words is "twelve billion, three hundred thirty-one million, four hundred six thousand, five hundred fifty-one".