2644070221 has 8 divisors (see below), whose sum is σ = 2853952640. Its totient is φ = 2435115312.

The previous prime is 2644070203. The next prime is 2644070243. The reversal of 2644070221 is 1220704462.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2644070221 - 2⁵ = 2644070189 is a prime.

It is a super-2 number, since 2×2644070221² = 13982214667157977682, which contains 22 as substring.

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 2644070221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644070921) 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, 225945 + ... + 237358.

It is an arithmetic number, because the mean of its divisors is an integer number (356744080).

Almost surely, 2^2644070221 is an apocalyptic number.

It is an amenable number.

2644070221 is a deficient number, since it is larger than the sum of its proper divisors (209882419).

2644070221 is a wasteful number, since it uses less digits than its factorization.

2644070221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463755.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2644070221 is about 51420.5233442835. The cubic root of 2644070221 is about 1382.7945578004.

Adding to 2644070221 its reverse (1220704462), we get a palindrome (3864774683).

The spelling of 2644070221 in words is "two billion, six hundred forty-four million, seventy thousand, two hundred twenty-one".