2112145555 has 32 divisors (see below), whose sum is σ = 2812126464. Its totient is φ = 1512815616.

The previous prime is 2112145517. The next prime is 2112145561. The reversal of 2112145555 is 5555412112.

It is not a de Polignac number, because 2112145555 - 2⁹ = 2112145043 is a prime.

It is a super-2 number, since 2×2112145555² = 8922317691012516050, which contains 22 as substring.

It is a Duffinian 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 31 ways as a sum of consecutive naturals, for example, 881439 + ... + 883831.

It is an arithmetic number, because the mean of its divisors is an integer number (87878952).

Almost surely, 2^2112145555 is an apocalyptic number.

2112145555 is a deficient number, since it is larger than the sum of its proper divisors (699980909).

2112145555 is a wasteful number, since it uses less digits than its factorization.

2112145555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815.

The product of its digits is 10000, while the sum is 31.

The square root of 2112145555 is about 45958.0847620960. The cubic root of 2112145555 is about 1283.0432056053.

Adding to 2112145555 its reverse (5555412112), we get a palindrome (7667557667).

The spelling of 2112145555 in words is "two billion, one hundred twelve million, one hundred forty-five thousand, five hundred fifty-five".