12551331 has 8 divisors (see below), whose sum is σ = 18022480. Its totient is φ = 7723872.

The previous prime is 12551327. The next prime is 12551339. The reversal of 12551331 is 13315521.

12551331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12551331 - 2² = 12551327 is a prime.

It is a super-2 number, since 2×12551331² = 315071819743122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12551298 and 12551307.

It is not an unprimeable number, because it can be changed into a prime (12551339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160876 + ... + 160953.

It is an arithmetic number, because the mean of its divisors is an integer number (2252810).

Almost surely, 2^12551331 is an apocalyptic number.

12551331 is a deficient number, since it is larger than the sum of its proper divisors (5471149).

12551331 is a wasteful number, since it uses less digits than its factorization.

12551331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321845.

The product of its digits is 450, while the sum is 21.

The square root of 12551331 is about 3542.7857682903. The cubic root of 12551331 is about 232.3966843544.

Adding to 12551331 its reverse (13315521), we get a palindrome (25866852).

The spelling of 12551331 in words is "twelve million, five hundred fifty-one thousand, three hundred thirty-one".