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85313023 = 312752033
BaseRepresentation
bin1010001010111…
…00010111111111
312221112100110121
411011130113333
5133320004043
612244315411
72054102005
oct505342777
9187470417
1085313023
114417aa34
12246a2b67
13148a07a3
14b48aa75
157752ded
hex515c5ff

85313023 has 4 divisors (see below), whose sum is σ = 88065088. Its totient is φ = 82560960.

The previous prime is 85312991. The next prime is 85313027. The reversal of 85313023 is 32031358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32031358 = 216015679.

It is a cyclic number.

It is not a de Polignac number, because 85313023 - 25 = 85312991 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 (85313027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1375986 + ... + 1376047.

It is an arithmetic number, because the mean of its divisors is an integer number (22016272).

Almost surely, 285313023 is an apocalyptic number.

85313023 is a deficient number, since it is larger than the sum of its proper divisors (2752065).

85313023 is a wasteful number, since it uses less digits than its factorization.

85313023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752064.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 85313023 is about 9236.5049125738. The cubic root of 85313023 is about 440.2220349753. Note that the first 3 decimals are identical.

The spelling of 85313023 in words is "eighty-five million, three hundred thirteen thousand, twenty-three".

Divisors: 1 31 2752033 85313023