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80502221 = 1915726987
BaseRepresentation
bin1001100110001…
…01110111001101
312121110221021202
410303011313031
5131102032341
611553235245
71665154232
oct463056715
9177427252
1080502221
1141494568
1222b62b25
13138a7b67
14a997789
15710279b
hex4cc5dcd

80502221 has 8 divisors (see below), whose sum is σ = 85282080. Its totient is φ = 75776688.

The previous prime is 80502209. The next prime is 80502239. The reversal of 80502221 is 12220508.

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

It is a cyclic number.

It is not a de Polignac number, because 80502221 - 226 = 13393357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80502193 and 80502202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80502271) 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, 10511 + ... + 16476.

It is an arithmetic number, because the mean of its divisors is an integer number (10660260).

Almost surely, 280502221 is an apocalyptic number.

It is an amenable number.

80502221 is a deficient number, since it is larger than the sum of its proper divisors (4779859).

80502221 is a wasteful number, since it uses less digits than its factorization.

80502221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27163.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 80502221 is about 8972.3029931005. The cubic root of 80502221 is about 431.7867263594.

Adding to 80502221 its reverse (12220508), we get a palindrome (92722729).

The spelling of 80502221 in words is "eighty million, five hundred two thousand, two hundred twenty-one".

Divisors: 1 19 157 2983 26987 512753 4236959 80502221