201628211 has 4 divisors (see below), whose sum is σ = 213488712. Its totient is φ = 189767712.

The previous prime is 201628183. The next prime is 201628223. The reversal of 201628211 is 112826102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201628211 - 2²⁶ = 134519347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201628291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5930225 + ... + 5930258.

It is an arithmetic number, because the mean of its divisors is an integer number (53372178).

Almost surely, 2^201628211 is an apocalyptic number.

201628211 is a deficient number, since it is larger than the sum of its proper divisors (11860501).

201628211 is a wasteful number, since it uses less digits than its factorization.

201628211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860500.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 201628211 is about 14199.5848882987. The cubic root of 201628211 is about 586.3862330866.

The spelling of 201628211 in words is "two hundred one million, six hundred twenty-eight thousand, two hundred eleven".