56172105 has 48 divisors (see below), whose sum is σ = 109122624. Its totient is φ = 26490240.

The previous prime is 56172089. The next prime is 56172107. The reversal of 56172105 is 50127165.

56172105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56172105 - 2⁴ = 56172089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56172107) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 16782 + ... + 19848.

It is an arithmetic number, because the mean of its divisors is an integer number (2273388).

Almost surely, 2^56172105 is an apocalyptic number.

56172105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56172105 is a deficient number, since it is larger than the sum of its proper divisors (52950519).

56172105 is a wasteful number, since it uses less digits than its factorization.

56172105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126 (or 3123 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 56172105 is about 7494.8052009375. The cubic root of 56172105 is about 382.9777702764.

The spelling of 56172105 in words is "fifty-six million, one hundred seventy-two thousand, one hundred five".