211164553 has 4 divisors (see below), whose sum is σ = 211197460. Its totient is φ = 211131648.

The previous prime is 211164521. The next prime is 211164617. The reversal of 211164553 is 355461112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156950784 + 54213769 = 12528^2 + 7363^2 .

It is a cyclic number.

It is not a de Polignac number, because 211164553 - 2⁵ = 211164521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211164853) 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 3 ways as a sum of consecutive naturals, for example, 3348 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (52799365).

Almost surely, 2^211164553 is an apocalyptic number.

It is an amenable number.

211164553 is a deficient number, since it is larger than the sum of its proper divisors (32907).

211164553 is an equidigital number, since it uses as much as digits as its factorization.

211164553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32906.

The product of its digits is 3600, while the sum is 28.

The square root of 211164553 is about 14531.5020902865. The cubic root of 211164553 is about 595.4889025937.

The spelling of 211164553 in words is "two hundred eleven million, one hundred sixty-four thousand, five hundred fifty-three".