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85831301 = 149576049
BaseRepresentation
bin1010001110110…
…10111010000101
312222111200102002
411013122322011
5133433100201
612303355045
72061361013
oct507327205
9188450362
1085831301
11444a4366
12248b2a85
1314a2266a
14b5838b3
15780676b
hex51dae85

85831301 has 4 divisors (see below), whose sum is σ = 86407500. Its totient is φ = 85255104.

The previous prime is 85831267. The next prime is 85831307. The reversal of 85831301 is 10313858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10313858 = 25156929.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 70543201 = 3910^2 + 8399^2 .

It is a cyclic number.

It is not a de Polignac number, because 85831301 - 218 = 85569157 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 (85831307) 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, 287876 + ... + 288173.

It is an arithmetic number, because the mean of its divisors is an integer number (21601875).

Almost surely, 285831301 is an apocalyptic number.

It is an amenable number.

85831301 is a deficient number, since it is larger than the sum of its proper divisors (576199).

85831301 is a wasteful number, since it uses less digits than its factorization.

85831301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576198.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 85831301 is about 9264.5183900730. The cubic root of 85831301 is about 441.1116878517. Note that the first 3 decimals are identical.

The spelling of 85831301 in words is "eighty-five million, eight hundred thirty-one thousand, three hundred one".

Divisors: 1 149 576049 85831301