2182737353281 has 3 divisors (see below), whose sum is σ = 2182738830691. Its totient is φ = 2182735875872.

The previous prime is 2182737353263. The next prime is 2182737353341. The reversal of 2182737353281 is 1823537372812.

The square root of 2182737353281 is 1477409.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 60004911681 + 2122732441600 = 244959^2 + 1456960^2 .

It is not a de Polignac number, because 2182737353281 - 2²⁷ = 2182603135553 is a prime.

It is a super-4 number, since 4×2182737353281⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2182737353201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 738705 + ... + 2216113.

Almost surely, 2^{2182737353281} is an apocalyptic number.

2182737353281 is the 1477409-th square number.

2182737353281 is the 738705-th centered octagonal number.

It is an amenable number.

2182737353281 is a deficient number, since it is larger than the sum of its proper divisors (1477410).

2182737353281 is an frugal number, since it uses more digits than its factorization.

2182737353281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954818 (or 1477409 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The spelling of 2182737353281 in words is "two trillion, one hundred eighty-two billion, seven hundred thirty-seven million, three hundred fifty-three thousand, two hundred eighty-one".