2183738281 has 4 divisors (see below), whose sum is σ = 2312193492. Its totient is φ = 2055283072.

The previous prime is 2183738201. The next prime is 2183738287. The reversal of 2183738281 is 1828373812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1672073881 + 511664400 = 40891^2 + 22620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2183738281 - 2²¹ = 2181641129 is a prime.

It is a super-2 number, since 2×2183738281² = 9537425759809669922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2183738287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64227580 + ... + 64227613.

It is an arithmetic number, because the mean of its divisors is an integer number (578048373).

Almost surely, 2^2183738281 is an apocalyptic number.

It is an amenable number.

2183738281 is a deficient number, since it is larger than the sum of its proper divisors (128455211).

2183738281 is a wasteful number, since it uses less digits than its factorization.

2183738281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128455210.

The product of its digits is 129024, while the sum is 43.

The square root of 2183738281 is about 46730.4855634948. The cubic root of 2183738281 is about 1297.3789955255.

The spelling of 2183738281 in words is "two billion, one hundred eighty-three million, seven hundred thirty-eight thousand, two hundred eighty-one".