12551512231 has 4 divisors (see below), whose sum is σ = 12564683712. Its totient is φ = 12538340752.

The previous prime is 12551512223. The next prime is 12551512249. The reversal of 12551512231 is 13221515521.

It is a happy number.

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 12551512231 - 2³ = 12551512223 is a prime.

It is a super-2 number, since 2×12551512231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12551512231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551512031) 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, 6584311 + ... + 6586216.

It is an arithmetic number, because the mean of its divisors is an integer number (3141170928).

Almost surely, 2^12551512231 is an apocalyptic number.

12551512231 is a deficient number, since it is larger than the sum of its proper divisors (13171481).

12551512231 is an equidigital number, since it uses as much as digits as its factorization.

12551512231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13171480.

The product of its digits is 3000, while the sum is 28.

The spelling of 12551512231 in words is "twelve billion, five hundred fifty-one million, five hundred twelve thousand, two hundred thirty-one".