2243231515521 has 20 divisors (see below), whose sum is σ = 3388651863300. Its totient is φ = 1478684439936.

The previous prime is 2243231515519. The next prime is 2243231515541. The reversal of 2243231515521 is 1255151323422.

2243231515521 is a `hidden beast` number, since 2 + 2 + 432 + 3 + 151 + 55 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1608876612225 + 634354903296 = 1268415^2 + 796464^2 .

It is not a de Polignac number, because 2243231515521 - 2¹ = 2243231515519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2243231515541) 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 19 ways as a sum of consecutive naturals, for example, 155578276 + ... + 155592693.

It is an arithmetic number, because the mean of its divisors is an integer number (169432593165).

Almost surely, 2^{2243231515521} is an apocalyptic number.

It is an amenable number.

2243231515521 is a deficient number, since it is larger than the sum of its proper divisors (1145420347779).

2243231515521 is an equidigital number, since it uses as much as digits as its factorization.

2243231515521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311171070 (or 311171061 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 2243231515521 its reverse (1255151323422), we get a palindrome (3498382838943).

The spelling of 2243231515521 in words is "two trillion, two hundred forty-three billion, two hundred thirty-one million, five hundred fifteen thousand, five hundred twenty-one".