2245442221 has 8 divisors (see below), whose sum is σ = 2486134944. Its totient is φ = 2010843120.

The previous prime is 2245442219. The next prime is 2245442231. The reversal of 2245442221 is 1222445422.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2245442221 - 2¹ = 2245442219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2245442221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245442231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522630 + ... + 1524103.

It is an arithmetic number, because the mean of its divisors is an integer number (310766868).

Almost surely, 2^2245442221 is an apocalyptic number.

It is an amenable number.

2245442221 is a deficient number, since it is larger than the sum of its proper divisors (240692723).

2245442221 is a wasteful number, since it uses less digits than its factorization.

2245442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046811.

The product of its digits is 10240, while the sum is 28.

The square root of 2245442221 is about 47386.0973387765. The cubic root of 2245442221 is about 1309.4853019490.

Adding to 2245442221 its reverse (1222445422), we get a palindrome (3467887643).

It can be divided in two parts, 224 and 5442221, that added together give a palindrome (5442445).

The spelling of 2245442221 in words is "two billion, two hundred forty-five million, four hundred forty-two thousand, two hundred twenty-one".