244143021 has 8 divisors (see below), whose sum is σ = 326127904. Its totient is φ = 162460080.

The previous prime is 244143019. The next prime is 244143049. The reversal of 244143021 is 120341442.

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

It is not a de Polignac number, because 244143021 - 2¹ = 244143019 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 (245143021) 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, 73591 + ... + 76836.

It is an arithmetic number, because the mean of its divisors is an integer number (40765988).

Almost surely, 2^244143021 is an apocalyptic number.

It is an amenable number.

244143021 is a deficient number, since it is larger than the sum of its proper divisors (81984883).

244143021 is a wasteful number, since it uses less digits than its factorization.

244143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150971.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 244143021 is about 15625.0766718119. The cubic root of 244143021 is about 625.0020445800.

Adding to 244143021 its reverse (120341442), we get a palindrome (364484463).

The spelling of 244143021 in words is "two hundred forty-four million, one hundred forty-three thousand, twenty-one".