2231660845 has 4 divisors (see below), whose sum is σ = 2677993020. Its totient is φ = 1785328672.

The previous prime is 2231660831. The next prime is 2231660863. The reversal of 2231660845 is 5480661322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5480661322 = 2 ⋅2740330661.

It can be written as a sum of positive squares in 2 ways, for example, as 1283144041 + 948516804 = 35821^2 + 30798^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231660845 - 2¹¹ = 2231658797 is a prime.

It is a super-3 number, since 3×2231660845³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223166080 + ... + 223166089.

It is an arithmetic number, because the mean of its divisors is an integer number (669498255).

Almost surely, 2^2231660845 is an apocalyptic number.

It is an amenable number.

2231660845 is a deficient number, since it is larger than the sum of its proper divisors (446332175).

2231660845 is an equidigital number, since it uses as much as digits as its factorization.

2231660845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446332174.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 2231660845 is about 47240.4577137013. The cubic root of 2231660845 is about 1306.8008187427.

The spelling of 2231660845 in words is "two billion, two hundred thirty-one million, six hundred sixty thousand, eight hundred forty-five".