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80393131 = 713267957
BaseRepresentation
bin1001100101010…
…11001110101011
312121021101122101
410302223032223
5131040040011
611551034231
71664221210
oct462531653
9177241571
1080393131
114141a605
1222b0b977
131386a300
14a969b07
1570d02c1
hex4cab3ab

80393131 has 12 divisors (see below), whose sum is σ = 99490512. Its totient is φ = 63606816.

The previous prime is 80393129. The next prime is 80393143. The reversal of 80393131 is 13139308.

It is not a de Polignac number, because 80393131 - 21 = 80393129 is a prime.

It is a super-2 number, since 2×803931312 = 12926111023966322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80393131.

It is not an unprimeable number, because it can be changed into a prime (80393431) 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, 32796 + ... + 35161.

It is an arithmetic number, because the mean of its divisors is an integer number (8290876).

Almost surely, 280393131 is an apocalyptic number.

80393131 is a deficient number, since it is larger than the sum of its proper divisors (19097381).

80393131 is a wasteful number, since it uses less digits than its factorization.

80393131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67990 (or 67977 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 80393131 is about 8966.2216680160. The cubic root of 80393131 is about 431.5915975526.

The spelling of 80393131 in words is "eighty million, three hundred ninety-three thousand, one hundred thirty-one".

Divisors: 1 7 13 91 169 1183 67957 475699 883441 6184087 11484733 80393131