2006744221 has 4 divisors (see below), whose sum is σ = 2055689244. Its totient is φ = 1957799200.

The previous prime is 2006744197. The next prime is 2006744237. The reversal of 2006744221 is 1224476002.

It is a happy number.

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 36360900 + 1970383321 = 6030^2 + 44389^2 .

It is not a de Polignac number, because 2006744221 - 2⁹ = 2006743709 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 2006744221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006744281) 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, 24472450 + ... + 24472531.

It is an arithmetic number, because the mean of its divisors is an integer number (513922311).

Almost surely, 2^2006744221 is an apocalyptic number.

It is an amenable number.

2006744221 is a deficient number, since it is larger than the sum of its proper divisors (48945023).

2006744221 is an equidigital number, since it uses as much as digits as its factorization.

2006744221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48945022.

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

The square root of 2006744221 is about 44796.6987734587. The cubic root of 2006744221 is about 1261.3356586792.

The spelling of 2006744221 in words is "two billion, six million, seven hundred forty-four thousand, two hundred twenty-one".