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102071665 = 520414333
BaseRepresentation
bin1100001010101…
…11110101110001
321010001210000001
412011113311301
5202112243130
614043430001
72346411013
oct605276561
9233053001
10102071665
1152686a53
122a225301
13181ba747
14d7b01b3
158e636ca
hex6157d71

102071665 has 4 divisors (see below), whose sum is σ = 122486004. Its totient is φ = 81657328.

The previous prime is 102071617. The next prime is 102071699. The reversal of 102071665 is 566170201.

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 73427761 + 28643904 = 8569^2 + 5352^2 .

It is a cyclic number.

It is not a de Polignac number, because 102071665 - 29 = 102071153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207162 + ... + 10207171.

It is an arithmetic number, because the mean of its divisors is an integer number (30621501).

Almost surely, 2102071665 is an apocalyptic number.

It is an amenable number.

102071665 is a deficient number, since it is larger than the sum of its proper divisors (20414339).

102071665 is an equidigital number, since it uses as much as digits as its factorization.

102071665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414338.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 102071665 is about 10103.0522615693. The cubic root of 102071665 is about 467.3422728515.

The spelling of 102071665 in words is "one hundred two million, seventy-one thousand, six hundred sixty-five".

Divisors: 1 5 20414333 102071665