4224650021 has 4 divisors (see below), whose sum is σ = 4268203212. Its totient is φ = 4181096832.

The previous prime is 4224649999. The next prime is 4224650029. The reversal of 4224650021 is 1200564224.

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 2664004996 + 1560645025 = 51614^2 + 39505^2 .

It is a cyclic number.

It is not a de Polignac number, because 4224650021 - 2¹⁸ = 4224387877 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 (4224650029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21776450 + ... + 21776643.

It is an arithmetic number, because the mean of its divisors is an integer number (1067050803).

Almost surely, 2^4224650021 is an apocalyptic number.

It is an amenable number.

4224650021 is a deficient number, since it is larger than the sum of its proper divisors (43553191).

4224650021 is an equidigital number, since it uses as much as digits as its factorization.

4224650021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43553190.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4224650021 is about 64997.3077980927. The cubic root of 4224650021 is about 1616.5789235311.

The spelling of 4224650021 in words is "four billion, two hundred twenty-four million, six hundred fifty thousand, twenty-one".