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80131757 = 471704931
BaseRepresentation
bin1001100011010…
…11011010101101
312120210010002212
410301223122231
5131003204012
611541300205
71662052166
oct461533255
9176703085
1080131757
11412611a2
1222a04665
13137a8354
14a8dc76d
15707cb22
hex4c6b6ad

80131757 has 4 divisors (see below), whose sum is σ = 81836736. Its totient is φ = 78426780.

The previous prime is 80131741. The next prime is 80131763. The reversal of 80131757 is 75713108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80131757 - 24 = 80131741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80131717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852419 + ... + 852512.

It is an arithmetic number, because the mean of its divisors is an integer number (20459184).

Almost surely, 280131757 is an apocalyptic number.

It is an amenable number.

80131757 is a deficient number, since it is larger than the sum of its proper divisors (1704979).

80131757 is a wasteful number, since it uses less digits than its factorization.

80131757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704978.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 80131757 is about 8951.6343200558. The cubic root of 80131757 is about 431.1233598041.

The spelling of 80131757 in words is "eighty million, one hundred thirty-one thousand, seven hundred fifty-seven".

Divisors: 1 47 1704931 80131757