211387533361 has 9 divisors (see below), whose sum is σ = 212491635993. Its totient is φ = 210289145220.

The previous prime is 211387533341. The next prime is 211387533373. The reversal of 211387533361 is 163335783112.

The square root of 211387533361 is 459769.

It is a perfect power (a square), and thus also a powerful number.

211387533361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211387533361 - 2⁹ = 211387532849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211387533341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 97010170 + ... + 97012348.

It is an arithmetic number, because the mean of its divisors is an integer number (23610181777).

Almost surely, 2^211387533361 is an apocalyptic number.

211387533361 is the 459769-th square number.

211387533361 is the 229885-th centered octagonal number.

It is an amenable number.

211387533361 is a deficient number, since it is larger than the sum of its proper divisors (1104102632).

211387533361 is an frugal number, since it uses more digits than its factorization.

211387533361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780 (or 2390 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The spelling of 211387533361 in words is "two hundred eleven billion, three hundred eighty-seven million, five hundred thirty-three thousand, three hundred sixty-one".