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80282531 = 723974127
BaseRepresentation
bin1001100100100…
…00001110100011
312121001202221002
410302100032203
5131023020111
611544422215
71663250600
oct462201643
9177052832
1080282531
11413544aa
1222a7796b
131382bb74
14a93b6a7
1570ac63b
hex4c903a3

80282531 has 12 divisors (see below), whose sum is σ = 93647808. Its totient is φ = 68623632.

The previous prime is 80282513. The next prime is 80282557. The reversal of 80282531 is 13528208.

It is not a de Polignac number, because 80282531 - 210 = 80281507 is a prime.

It is a super-2 number, since 2×802825312 = 12890569567531922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80282494 and 80282503.

It is not an unprimeable number, because it can be changed into a prime (80282131) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17390 + ... + 21516.

It is an arithmetic number, because the mean of its divisors is an integer number (7803984).

Almost surely, 280282531 is an apocalyptic number.

80282531 is a deficient number, since it is larger than the sum of its proper divisors (13365277).

80282531 is a wasteful number, since it uses less digits than its factorization.

80282531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538 (or 4531 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 80282531 is about 8960.0519529744. The cubic root of 80282531 is about 431.3935875290.

The spelling of 80282531 in words is "eighty million, two hundred eighty-two thousand, five hundred thirty-one".

Divisors: 1 7 49 397 2779 4127 19453 28889 202223 1638419 11468933 80282531