2244002021 has 4 divisors (see below), whose sum is σ = 2247932544. Its totient is φ = 2240071500.

The previous prime is 2244002017. The next prime is 2244002029. The reversal of 2244002021 is 1202004422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2244002021 - 2² = 2244002017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2244002029) 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, 1964405 + ... + 1965546.

It is an arithmetic number, because the mean of its divisors is an integer number (561983136).

Almost surely, 2^2244002021 is an apocalyptic number.

It is an amenable number.

2244002021 is a deficient number, since it is larger than the sum of its proper divisors (3930523).

2244002021 is an equidigital number, since it uses as much as digits as its factorization.

2244002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930522.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2244002021 is about 47370.8984609750. The cubic root of 2244002021 is about 1309.2052792939.

Adding to 2244002021 its reverse (1202004422), we get a palindrome (3446006443).

The spelling of 2244002021 in words is "two billion, two hundred forty-four million, two thousand, twenty-one".