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144434213 = 731138281
BaseRepresentation
bin10001001101111…
…10010000100101
3101001210000111022
420212332100211
5243433343323
622155420525
73402446000
oct1046762045
9331700438
10144434213
1174590620
1240454745
1323c00741
141527a537
15ca304c8
hex89be425

144434213 has 16 divisors (see below), whose sum is σ = 183753600. Its totient is φ = 112543200.

The previous prime is 144434203. The next prime is 144434237. The reversal of 144434213 is 312434441.

It is not a de Polignac number, because 144434213 - 214 = 144417829 is a prime.

It is a super-2 number, since 2×1444342132 = 41722483769858738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144434203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15368 + ... + 22913.

It is an arithmetic number, because the mean of its divisors is an integer number (11484600).

Almost surely, 2144434213 is an apocalyptic number.

It is an amenable number.

144434213 is a deficient number, since it is larger than the sum of its proper divisors (39319387).

144434213 is an equidigital number, since it uses as much as digits as its factorization.

144434213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38313 (or 38299 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 144434213 is about 12018.0785901907. The cubic root of 144434213 is about 524.6745835204.

Adding to 144434213 its reverse (312434441), we get a palindrome (456868654).

The spelling of 144434213 in words is "one hundred forty-four million, four hundred thirty-four thousand, two hundred thirteen".

Divisors: 1 7 11 49 77 343 539 3773 38281 267967 421091 1875769 2947637 13130383 20633459 144434213