2155056111 has 40 divisors (see below), whose sum is σ = 3472225680. Its totient is φ = 1324159488.

The previous prime is 2155056103. The next prime is 2155056121. The reversal of 2155056111 is 1116505512.

It is not a de Polignac number, because 2155056111 - 2³ = 2155056103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155056121) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 977136 + ... + 979338.

It is an arithmetic number, because the mean of its divisors is an integer number (86805642).

Almost surely, 2^2155056111 is an apocalyptic number.

2155056111 is a deficient number, since it is larger than the sum of its proper divisors (1317169569).

2155056111 is a wasteful number, since it uses less digits than its factorization.

2155056111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3148 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 2155056111 is about 46422.5819079465. The cubic root of 2155056111 is about 1291.6738304387.

The spelling of 2155056111 in words is "two billion, one hundred fifty-five million, fifty-six thousand, one hundred eleven".