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80153081 = 775710333
BaseRepresentation
bin1001100011100…
…00100111111001
312120211012100122
410301300213321
5131004344311
611541543025
71662201311
oct461604771
9176735318
1080153081
1141276218
1222a14a75
13137b4c78
14a906441
1570840db
hex4c709f9

80153081 has 4 divisors (see below), whose sum is σ = 80171172. Its totient is φ = 80134992.

The previous prime is 80153069. The next prime is 80153111. The reversal of 80153081 is 18035108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62647225 + 17505856 = 7915^2 + 4184^2 .

It is a cyclic number.

It is not a de Polignac number, because 80153081 - 222 = 75958777 is a prime.

It is a super-2 number, since 2×801530812 = 12849032787585122, 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 80153081.

It is not an unprimeable number, because it can be changed into a prime (80153881) 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, 2591 + ... + 12923.

It is an arithmetic number, because the mean of its divisors is an integer number (20042793).

Almost surely, 280153081 is an apocalyptic number.

It is an amenable number.

80153081 is a deficient number, since it is larger than the sum of its proper divisors (18091).

80153081 is a wasteful number, since it uses less digits than its factorization.

80153081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18090.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 80153081 is about 8952.8253082477. The cubic root of 80153081 is about 431.1615987392.

Adding to 80153081 its reverse (18035108), we get a palindrome (98188189).

The spelling of 80153081 in words is "eighty million, one hundred fifty-three thousand, eighty-one".

Divisors: 1 7757 10333 80153081