211165163453 has 6 divisors (see below), whose sum is σ = 214804899774. Its totient is φ = 207586089464.

The previous prime is 211165163381. The next prime is 211165163459. The reversal of 211165163453 is 354361561112.

It can be written as a sum of positive squares in only one way, i.e., 179353944004 + 31811219449 = 423502^2 + 178357^2 .

It is not a de Polignac number, because 211165163453 - 2³⁰ = 210091421629 is a prime.

It is a super-2 number, since 2×211165163453² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211165163459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30327626 + ... + 30334587.

It is an arithmetic number, because the mean of its divisors is an integer number (35800816629).

Almost surely, 2^211165163453 is an apocalyptic number.

It is an amenable number.

211165163453 is a deficient number, since it is larger than the sum of its proper divisors (3639736321).

211165163453 is an frugal number, since it uses more digits than its factorization.

211165163453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60662331 (or 60662272 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The spelling of 211165163453 in words is "two hundred eleven billion, one hundred sixty-five million, one hundred sixty-three thousand, four hundred fifty-three".