211797453 has 12 divisors (see below), whose sum is σ = 328502400. Its totient is φ = 121027032.

The previous prime is 211797437. The next prime is 211797461. The reversal of 211797453 is 354797112.

It is not a de Polignac number, because 211797453 - 2⁴ = 211797437 is a prime.

It is a super-2 number, since 2×211797453² = 89716322194574418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211797413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720253 + ... + 720546.

It is an arithmetic number, because the mean of its divisors is an integer number (27375200).

Almost surely, 2^211797453 is an apocalyptic number.

It is an amenable number.

211797453 is a deficient number, since it is larger than the sum of its proper divisors (116704947).

211797453 is a wasteful number, since it uses less digits than its factorization.

211797453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440816 (or 1440809 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 211797453 is about 14553.2626238930. The cubic root of 211797453 is about 596.0832400666.

The spelling of 211797453 in words is "two hundred eleven million, seven hundred ninety-seven thousand, four hundred fifty-three".