12857224157 has 4 divisors (see below), whose sum is σ = 12982051680. Its totient is φ = 12732396636.

The previous prime is 12857224147. The next prime is 12857224189. The reversal of 12857224157 is 75142275821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12857224157 - 2²⁰ = 12856175581 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 (12857224147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62413607 + ... + 62413812.

It is an arithmetic number, because the mean of its divisors is an integer number (3245512920).

Almost surely, 2^12857224157 is an apocalyptic number.

It is an amenable number.

12857224157 is a deficient number, since it is larger than the sum of its proper divisors (124827523).

12857224157 is a wasteful number, since it uses less digits than its factorization.

12857224157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124827522.

The product of its digits is 313600, while the sum is 44.

Adding to 12857224157 its reverse (75142275821), we get a palindrome (87999499978).

The spelling of 12857224157 in words is "twelve billion, eight hundred fifty-seven million, two hundred twenty-four thousand, one hundred fifty-seven".