2166525547 has 8 divisors (see below), whose sum is σ = 2173229136. Its totient is φ = 2159831712.

The previous prime is 2166525541. The next prime is 2166525563. The reversal of 2166525547 is 7455256612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166525547 - 2³ = 2166525539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166525541) 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 7 ways as a sum of consecutive naturals, for example, 807973 + ... + 810649.

It is an arithmetic number, because the mean of its divisors is an integer number (271653642).

Almost surely, 2^2166525547 is an apocalyptic number.

2166525547 is a deficient number, since it is larger than the sum of its proper divisors (6703589).

2166525547 is a wasteful number, since it uses less digits than its factorization.

2166525547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its digits is 504000, while the sum is 43.

The square root of 2166525547 is about 46545.9509194946. The cubic root of 2166525547 is about 1293.9612520617.

The spelling of 2166525547 in words is "two billion, one hundred sixty-six million, five hundred twenty-five thousand, five hundred forty-seven".