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80512471 = 1310757881
BaseRepresentation
bin1001100110010…
…00010111010111
312121111110100101
410303020113113
5131102344341
611553354531
71665226144
oct463102727
9177443311
1080512471
11414a1236
1222b68a47
13138ac720
14a99b3cb
157105831
hex4cc85d7

80512471 has 8 divisors (see below), whose sum is σ = 87517584. Its totient is φ = 73623360.

The previous prime is 80512463. The next prime is 80512477. The reversal of 80512471 is 17421508.

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 80512471 - 23 = 80512463 is a prime.

It is a super-3 number, since 3×805124713 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80512477) 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, 27550 + ... + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (10939698).

Almost surely, 280512471 is an apocalyptic number.

80512471 is a deficient number, since it is larger than the sum of its proper divisors (7005113).

80512471 is a wasteful number, since it uses less digits than its factorization.

80512471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58001.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 80512471 is about 8972.8741772077. The cubic root of 80512471 is about 431.8050514278.

Adding to 80512471 its reverse (17421508), we get a palindrome (97933979).

The spelling of 80512471 in words is "eighty million, five hundred twelve thousand, four hundred seventy-one".

Divisors: 1 13 107 1391 57881 752453 6193267 80512471