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80811325 = 5271632833
BaseRepresentation
bin1001101000100…
…01010100111101
312122001122022001
410310101110331
5131141430300
612004022301
72000612350
oct464212475
9178048261
1080811325
1141685821
1223091991
131398576a
14aa38297
15716416a
hex4d1153d

80811325 has 24 divisors (see below), whose sum is σ = 115264448. Its totient is φ = 55054080.

The previous prime is 80811323. The next prime is 80811343. The reversal of 80811325 is 52311808.

It is not a de Polignac number, because 80811325 - 21 = 80811323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80811293 and 80811302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80811323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27109 + ... + 29941.

Almost surely, 280811325 is an apocalyptic number.

It is an amenable number.

80811325 is a deficient number, since it is larger than the sum of its proper divisors (34453123).

80811325 is a wasteful number, since it uses less digits than its factorization.

80811325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013 (or 3008 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 80811325 is about 8989.5119444829. The cubic root of 80811325 is about 432.3386636926.

The spelling of 80811325 in words is "eighty million, eight hundred eleven thousand, three hundred twenty-five".

Divisors: 1 5 7 25 35 163 175 815 1141 2833 4075 5705 14165 19831 28525 70825 99155 461779 495775 2308895 3232453 11544475 16162265 80811325