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80808101 = 117346191
BaseRepresentation
bin1001101000100…
…00100010100101
312122001110212122
410310100202211
5131141324401
612003555325
72000600063
oct464204245
9178043778
1080808101
1141683360
122308bb45
131398415a
14aa37033
15716321b
hex4d108a5

80808101 has 4 divisors (see below), whose sum is σ = 88154304. Its totient is φ = 73461900.

The previous prime is 80808071. The next prime is 80808107. The reversal of 80808101 is 10180808.

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 80808101 - 218 = 80545957 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 (80808107) 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, 3673085 + ... + 3673106.

It is an arithmetic number, because the mean of its divisors is an integer number (22038576).

Almost surely, 280808101 is an apocalyptic number.

It is an amenable number.

80808101 is a deficient number, since it is larger than the sum of its proper divisors (7346203).

80808101 is a wasteful number, since it uses less digits than its factorization.

80808101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346202.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 80808101 is about 8989.3326226144. The cubic root of 80808101 is about 432.3329141751.

Adding to 80808101 its reverse (10180808), we get a palindrome (90988909).

The spelling of 80808101 in words is "eighty million, eight hundred eight thousand, one hundred one".

Divisors: 1 11 7346191 80808101