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80538291 = 3215835653
BaseRepresentation
bin1001100110011…
…10101010110011
312121112202202200
410303032222303
5131104211131
611554114243
71665364341
oct463165263
9177482680
1080538291
1141509679
1222b7b983
13138bb3c2
14a9a6991
15710d2e6
hex4cceab3

80538291 has 12 divisors (see below), whose sum is σ = 116427168. Its totient is φ = 53648784.

The previous prime is 80538287. The next prime is 80538313. The reversal of 80538291 is 19283508.

It is not a de Polignac number, because 80538291 - 22 = 80538287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80538091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11421 + ... + 17073.

It is an arithmetic number, because the mean of its divisors is an integer number (9702264).

Almost surely, 280538291 is an apocalyptic number.

80538291 is a deficient number, since it is larger than the sum of its proper divisors (35888877).

80538291 is a wasteful number, since it uses less digits than its factorization.

80538291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242 (or 7239 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 80538291 is about 8974.3128427752. The cubic root of 80538291 is about 431.8512058296.

The spelling of 80538291 in words is "eighty million, five hundred thirty-eight thousand, two hundred ninety-one".

Divisors: 1 3 9 1583 4749 5653 14247 16959 50877 8948699 26846097 80538291