2154756105 has 24 divisors (see below), whose sum is σ = 3749463432. Its totient is φ = 1144725504.

The previous prime is 2154756089. The next prime is 2154756133. The reversal of 2154756105 is 5016574512.

2154756105 is a `hidden beast` number, since 2 + 1 + 547 + 5 + 6 + 105 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 351225081 + 1803531024 = 18741^2 + 42468^2 .

It is not a de Polignac number, because 2154756105 - 2⁴ = 2154756089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154756105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81594 + ... + 104723.

It is an arithmetic number, because the mean of its divisors is an integer number (156227643).

Almost surely, 2^2154756105 is an apocalyptic number.

It is an amenable number.

2154756105 is a deficient number, since it is larger than the sum of its proper divisors (1594707327).

2154756105 is a wasteful number, since it uses less digits than its factorization.

2154756105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186585 (or 186582 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 2154756105 is about 46419.3505447890. The cubic root of 2154756105 is about 1291.6138895582.

The spelling of 2154756105 in words is "two billion, one hundred fifty-four million, seven hundred fifty-six thousand, one hundred five".