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2071987211 = 72521117413
BaseRepresentation
bin111101110000000…
…0000010000001011
312100101210212010002
41323200000100023
513220412042321
6541333513215
7102226413020
oct17340002013
95311725102
102071987211
11973645728
12499aa280b
13270360548
14159277547
15c1d8220b
hex7b80040b

2071987211 has 8 divisors (see below), whose sum is σ = 2368944864. Its totient is φ = 1775269440.

The previous prime is 2071987171. The next prime is 2071987231. The reversal of 2071987211 is 1127891702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2071987211 - 26 = 2071987147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2071987231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41060 + ... + 76353.

It is an arithmetic number, because the mean of its divisors is an integer number (296118108).

Almost surely, 22071987211 is an apocalyptic number.

2071987211 is a deficient number, since it is larger than the sum of its proper divisors (296957653).

2071987211 is a wasteful number, since it uses less digits than its factorization.

2071987211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119941.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 2071987211 is about 45519.0862276474. The cubic root of 2071987211 is about 1274.8595946375.

The spelling of 2071987211 in words is "two billion, seventy-one million, nine hundred eighty-seven thousand, two hundred eleven".

Divisors: 1 7 2521 17647 117413 821891 295998173 2071987211