2243409521 has 4 divisors (see below), whose sum is σ = 2320768500. Its totient is φ = 2166050544.

The previous prime is 2243409517. The next prime is 2243409523. The reversal of 2243409521 is 1259043422.

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 1240800625 + 1002608896 = 35225^2 + 31664^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243409521 - 2² = 2243409517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2243409523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38679446 + ... + 38679503.

It is an arithmetic number, because the mean of its divisors is an integer number (580192125).

Almost surely, 2^2243409521 is an apocalyptic number.

It is an amenable number.

2243409521 is a deficient number, since it is larger than the sum of its proper divisors (77358979).

2243409521 is an equidigital number, since it uses as much as digits as its factorization.

2243409521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77358978.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2243409521 is about 47364.6442085233. The cubic root of 2243409521 is about 1309.0900428543.

The spelling of 2243409521 in words is "two billion, two hundred forty-three million, four hundred nine thousand, five hundred twenty-one".