2221489409 has 4 divisors (see below), whose sum is σ = 2222470740. Its totient is φ = 2220508080.

The previous prime is 2221489379. The next prime is 2221489411. The reversal of 2221489409 is 9049841222.

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 1130640625 + 1090848784 = 33625^2 + 33028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221489409 - 2¹² = 2221485313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221489469) 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, 487262 + ... + 491799.

It is an arithmetic number, because the mean of its divisors is an integer number (555617685).

Almost surely, 2^2221489409 is an apocalyptic number.

It is an amenable number.

2221489409 is a deficient number, since it is larger than the sum of its proper divisors (981331).

2221489409 is an equidigital number, since it uses as much as digits as its factorization.

2221489409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981330.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 2221489409 is about 47132.6787802264. The cubic root of 2221489409 is about 1304.8124212806.

The spelling of 2221489409 in words is "two billion, two hundred twenty-one million, four hundred eighty-nine thousand, four hundred nine".