4244570021 has 4 divisors (see below), whose sum is σ = 4245968844. Its totient is φ = 4243171200.

The previous prime is 4244570017. The next prime is 4244570101. The reversal of 4244570021 is 1200754424.

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 2498500225 + 1746069796 = 49985^2 + 41786^2 .

It is a cyclic number.

It is not a de Polignac number, because 4244570021 - 2² = 4244570017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4244570221) 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, 694850 + ... + 700931.

It is an arithmetic number, because the mean of its divisors is an integer number (1061492211).

Almost surely, 2^4244570021 is an apocalyptic number.

It is an amenable number.

4244570021 is a deficient number, since it is larger than the sum of its proper divisors (1398823).

4244570021 is a wasteful number, since it uses less digits than its factorization.

4244570021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398822.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 4244570021 is about 65150.3647035072. The cubic root of 4244570021 is about 1619.1157625584.

The spelling of 4244570021 in words is "four billion, two hundred forty-four million, five hundred seventy thousand, twenty-one".