244243021 has 8 divisors (see below), whose sum is σ = 269658144. Its totient is φ = 219363120.

The previous prime is 244243019. The next prime is 244243033. The reversal of 244243021 is 120342442.

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 244243021 - 2¹ = 244243019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244242983 and 244243001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244243001) 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, 132846 + ... + 134671.

It is an arithmetic number, because the mean of its divisors is an integer number (33707268).

Almost surely, 2^244243021 is an apocalyptic number.

It is an amenable number.

244243021 is a deficient number, since it is larger than the sum of its proper divisors (25415123).

244243021 is a wasteful number, since it uses less digits than its factorization.

244243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267611.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 244243021 is about 15628.2763285015. The cubic root of 244243021 is about 625.0873657070.

Adding to 244243021 its reverse (120342442), we get a palindrome (364585463).

The spelling of 244243021 in words is "two hundred forty-four million, two hundred forty-three thousand, twenty-one".