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80380221 = 368339229
BaseRepresentation
bin1001100101010…
…00000100111101
312121020201221020
410302220010331
5131034131341
611550454353
71664135445
oct462500475
9177221836
1080380221
1141410939
1222b043b9
131386447c
14a965125
1570cb566
hex4ca813d

80380221 has 8 divisors (see below), whose sum is σ = 107333280. Its totient is φ = 53506992.

The previous prime is 80380217. The next prime is 80380247. The reversal of 80380221 is 12208308.

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

It is not a de Polignac number, because 80380221 - 22 = 80380217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80380191 and 80380200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80380921) 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, 17566 + ... + 21663.

It is an arithmetic number, because the mean of its divisors is an integer number (13416660).

Almost surely, 280380221 is an apocalyptic number.

It is an amenable number.

80380221 is a deficient number, since it is larger than the sum of its proper divisors (26953059).

80380221 is a wasteful number, since it uses less digits than its factorization.

80380221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39915.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 80380221 is about 8965.5017149070. The cubic root of 80380221 is about 431.5684938134.

Adding to 80380221 its reverse (12208308), we get a palindrome (92588529).

It can be divided in two parts, 80380 and 221, that added together give a triangular number (80601 = T401).

The spelling of 80380221 in words is "eighty million, three hundred eighty thousand, two hundred twenty-one".

Divisors: 1 3 683 2049 39229 117687 26793407 80380221