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201061985 = 540212397
BaseRepresentation
bin10111111101111…
…11011001100001
3112000100000012012
423332333121201
5402432440420
631541242305
74660666355
oct1376773141
9460300165
10201061985
11a3548933
1257403395
13328697b7
141c9bb465
15129b8dc5
hexbfbf661

201061985 has 4 divisors (see below), whose sum is σ = 241274388. Its totient is φ = 160849584.

The previous prime is 201061979. The next prime is 201062003. The reversal of 201061985 is 589160102.

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 141324544 + 59737441 = 11888^2 + 7729^2 .

It is a cyclic number.

It is not a de Polignac number, because 201061985 - 24 = 201061969 is a prime.

It is a tetranacci number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20106194 + ... + 20106203.

It is an arithmetic number, because the mean of its divisors is an integer number (60318597).

Almost surely, 2201061985 is an apocalyptic number.

It is an amenable number.

201061985 is a deficient number, since it is larger than the sum of its proper divisors (40212403).

201061985 is an equidigital number, since it uses as much as digits as its factorization.

201061985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40212402.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 201061985 is about 14179.6327526491. The cubic root of 201061985 is about 585.8368086080.

The spelling of 201061985 in words is "two hundred one million, sixty-one thousand, nine hundred eighty-five".

Divisors: 1 5 40212397 201061985