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2009451085 = 51727778513
BaseRepresentation
bin111011111000101…
…1100101001001101
312012001010200200021
41313301130221031
513103404413320
6531221302141
7100540023655
oct16761345115
95161120607
102009451085
11941312384
12480b64951
13260406115
14150c39365
15bb62cdaa
hex77c5ca4d

2009451085 has 16 divisors (see below), whose sum is σ = 2554404336. Its totient is φ = 1512275968.

The previous prime is 2009451013. The next prime is 2009451107. The reversal of 2009451085 is 5801549002.

It can be written as a sum of positive squares in 8 ways, for example, as 82065481 + 1927385604 = 9059^2 + 43902^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009451085 - 211 = 2009449037 is a prime.

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 2009451085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231789 + ... + 240301.

It is an arithmetic number, because the mean of its divisors is an integer number (159650271).

Almost surely, 22009451085 is an apocalyptic number.

It is an amenable number.

2009451085 is a deficient number, since it is larger than the sum of its proper divisors (544953251).

2009451085 is a wasteful number, since it uses less digits than its factorization.

2009451085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 2009451085 is about 44826.9013539861. The cubic root of 2009451085 is about 1261.9025354560.

The spelling of 2009451085 in words is "two billion, nine million, four hundred fifty-one thousand, eighty-five".

Divisors: 1 5 17 85 2777 8513 13885 42565 47209 144721 236045 723605 23640601 118203005 401890217 2009451085