211164453 has 6 divisors (see below), whose sum is σ = 305015334. Its totient is φ = 140776296.

The previous prime is 211164431. The next prime is 211164479. The reversal of 211164453 is 354461112.

It is a happy number.

211164453 is a `hidden beast` number, since 2 + 1 + 11 + 644 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 147914244 + 63250209 = 12162^2 + 7953^2 .

It is not a de Polignac number, because 211164453 - 2⁶ = 211164389 is a prime.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 11731350 + ... + 11731367.

It is an arithmetic number, because the mean of its divisors is an integer number (50835889).

Almost surely, 2^211164453 is an apocalyptic number.

It is an amenable number.

211164453 is a deficient number, since it is larger than the sum of its proper divisors (93850881).

211164453 is a wasteful number, since it uses less digits than its factorization.

211164453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23462723 (or 23462720 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 211164453 is about 14531.4986494855. The cubic root of 211164453 is about 595.4888085929.

It can be divided in two parts, 2111 and 64453, that added together give a square (66564 = 258²).

The spelling of 211164453 in words is "two hundred eleven million, one hundred sixty-four thousand, four hundred fifty-three".