27172101 has 16 divisors (see below), whose sum is σ = 40887360. Its totient is φ = 15899520.

The previous prime is 27172099. The next prime is 27172111. The reversal of 27172101 is 10127172.

It is a happy number.

It is not a de Polignac number, because 27172101 - 2¹ = 27172099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27172111) 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 15 ways as a sum of consecutive naturals, for example, 13240 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (2555460).

Almost surely, 2^27172101 is an apocalyptic number.

It is an amenable number.

27172101 is a deficient number, since it is larger than the sum of its proper divisors (13715259).

27172101 is a wasteful number, since it uses less digits than its factorization.

27172101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28436.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 27172101 is about 5212.6865434246. The cubic root of 27172101 is about 300.6360615769.

Adding to 27172101 its reverse (10127172), we get a palindrome (37299273).

The spelling of 27172101 in words is "twenty-seven million, one hundred seventy-two thousand, one hundred one".