12551431 has 4 divisors (see below), whose sum is σ = 12576600. Its totient is φ = 12526264.

The previous prime is 12551417. The next prime is 12551437. The reversal of 12551431 is 13415521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12551431 is a prime.

It is a super-2 number, since 2×12551431² = 315076840295522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551437) 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 3 ways as a sum of consecutive naturals, for example, 11821 + ... + 12838.

It is an arithmetic number, because the mean of its divisors is an integer number (3144150).

Almost surely, 2^12551431 is an apocalyptic number.

12551431 is a deficient number, since it is larger than the sum of its proper divisors (25169).

12551431 is an equidigital number, since it uses as much as digits as its factorization.

12551431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25168.

The product of its digits is 600, while the sum is 22.

The square root of 12551431 is about 3542.7998814497. The cubic root of 12551431 is about 232.3973015428.

Adding to 12551431 its reverse (13415521), we get a palindrome (25966952).

The spelling of 12551431 in words is "twelve million, five hundred fifty-one thousand, four hundred thirty-one".