217166053 has 16 divisors (see below), whose sum is σ = 240835392. Its totient is φ = 194544000.

The previous prime is 217166051. The next prime is 217166077. The reversal of 217166053 is 350661712.

It is a cyclic number.

It is not a de Polignac number, because 217166053 - 2¹ = 217166051 is a prime.

It is a super-2 number, since 2×217166053² = 94322189151197618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217166051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111498 + ... + 113428.

It is an arithmetic number, because the mean of its divisors is an integer number (15052212).

Almost surely, 2^217166053 is an apocalyptic number.

It is an amenable number.

217166053 is a deficient number, since it is larger than the sum of its proper divisors (23669339).

217166053 is a wasteful number, since it uses less digits than its factorization.

217166053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 217166053 is about 14736.5549909061. The cubic root of 217166053 is about 601.0777416661.

The spelling of 217166053 in words is "two hundred seventeen million, one hundred sixty-six thousand, fifty-three".