12571222550 has 48 divisors (see below), whose sum is σ = 23785196400. Its totient is φ = 4942608000.

The previous prime is 12571222537. The next prime is 12571222589. The reversal of 12571222550 is 5522217521.

12571222550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 692996 + ... + 710904.

It is an arithmetic number, because the mean of its divisors is an integer number (495524925).

Almost surely, 2^12571222550 is an apocalyptic number.

12571222550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12571222550 is a deficient number, since it is larger than the sum of its proper divisors (11213973850).

12571222550 is a wasteful number, since it uses less digits than its factorization.

12571222550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18161 (or 18156 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The spelling of 12571222550 in words is "twelve billion, five hundred seventy-one million, two hundred twenty-two thousand, five hundred fifty".