2201784113281 has 9 divisors (see below), whose sum is σ = 2244191200041. Its totient is φ = 2160163857072.

The previous prime is 2201784113119. The next prime is 2201784113327. The reversal of 2201784113281 is 1823114871022.

The square root of 2201784113281 is 1483841.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1050540951681 + 1151243161600 = 1024959^2 + 1072960^2 .

It is not a de Polignac number, because 2201784113281 - 2¹³ = 2201784105089 is a prime.

It is a super-2 number, since 2×2201784113281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201788113281) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 78629575 + ... + 78657571.

Almost surely, 2^{2201784113281} is an apocalyptic number.

2201784113281 is the 1483841-st square number.

2201784113281 is the 741921-st centered octagonal number.

It is an amenable number.

2201784113281 is a deficient number, since it is larger than the sum of its proper divisors (42407086760).

2201784113281 is an frugal number, since it uses more digits than its factorization.

2201784113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56100 (or 28050 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 2201784113281 in words is "two trillion, two hundred one billion, seven hundred eighty-four million, one hundred thirteen thousand, two hundred eighty-one".