2143122555 has 48 divisors (see below), whose sum is σ = 3994341120. Its totient is φ = 978360768.

The previous prime is 2143122551. The next prime is 2143122571. The reversal of 2143122555 is 5552213412.

It is not a de Polignac number, because 2143122555 - 2² = 2143122551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2143122551) 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 47 ways as a sum of consecutive naturals, for example, 694506 + ... + 697584.

It is an arithmetic number, because the mean of its divisors is an integer number (83215440).

Almost surely, 2^2143122555 is an apocalyptic number.

2143122555 is a deficient number, since it is larger than the sum of its proper divisors (1851218565).

2143122555 is a wasteful number, since it uses less digits than its factorization.

2143122555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048 (or 4041 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 2143122555 is about 46293.8716786574. The cubic root of 2143122555 is about 1289.2852148535.

Adding to 2143122555 its reverse (5552213412), we get a palindrome (7695335967).

The spelling of 2143122555 in words is "two billion, one hundred forty-three million, one hundred twenty-two thousand, five hundred fifty-five".