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244144721 = 641380881
BaseRepresentation
bin11101000110101…
…01101001010001
3122000101211121002
432203111221101
51000000112341
640120511345
76023124122
oct1643255121
9560354532
10244144721
111158a45a7
126991b555
133b772542
14245d4049
151667929b
hexe8d5a51

244144721 has 4 divisors (see below), whose sum is σ = 244526244. Its totient is φ = 243763200.

The previous prime is 244144697. The next prime is 244144729. The reversal of 244144721 is 127441442.

244144721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 219780625 + 24364096 = 14825^2 + 4936^2 .

It is a sliding number, since 244144721 = 4096 + 244140625 and 1/4096 + 1/244140625 = 0.000244144721.

It is a cyclic number.

It is not a de Polignac number, because 244144721 - 26 = 244144657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244144729) 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, 189800 + ... + 191081.

It is an arithmetic number, because the mean of its divisors is an integer number (61131561).

Almost surely, 2244144721 is an apocalyptic number.

It is an amenable number.

244144721 is a deficient number, since it is larger than the sum of its proper divisors (381523).

244144721 is an equidigital number, since it uses as much as digits as its factorization.

244144721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381522.

The product of its digits is 7168, while the sum is 29.

The square root of 244144721 is about 15625.1310714502. The cubic root of 244144721 is about 625.0034952338.

The spelling of 244144721 in words is "two hundred forty-four million, one hundred forty-four thousand, seven hundred twenty-one".

Divisors: 1 641 380881 244144721