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144220215 = 35311931607
BaseRepresentation
bin10001001100010…
…10000000110111
3101001101010221110
420212022000313
5243410021330
622151050103
73400565046
oct1046120067
9331333843
10144220215
1174454867
1240370933
1323b57209
141522255d
15c9dbdb0
hex898a037

144220215 has 32 divisors (see below), whose sum is σ = 239579136. Its totient is φ = 74004480.

The previous prime is 144220207. The next prime is 144220273. The reversal of 144220215 is 512022441.

It is not a de Polignac number, because 144220215 - 23 = 144220207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144220191 and 144220200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88942 + ... + 90548.

It is an arithmetic number, because the mean of its divisors is an integer number (7486848).

Almost surely, 2144220215 is an apocalyptic number.

144220215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

144220215 is a deficient number, since it is larger than the sum of its proper divisors (95358921).

144220215 is a wasteful number, since it uses less digits than its factorization.

144220215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 144220215 is about 12009.1721196759. The cubic root of 144220215 is about 524.4153309814.

Adding to 144220215 its reverse (512022441), we get a palindrome (656242656).

The spelling of 144220215 in words is "one hundred forty-four million, two hundred twenty thousand, two hundred fifteen".

Divisors: 1 3 5 15 31 93 155 193 465 579 965 1607 2895 4821 5983 8035 17949 24105 29915 49817 89745 149451 249085 310151 747255 930453 1550755 4652265 9614681 28844043 48073405 144220215