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211248005 = 564365707
BaseRepresentation
bin11001001011101…
…10001110000101
3112201111111210012
430211312032011
5413034414010
632543440005
75143402253
oct1445661605
9481444705
10211248005
11a9275831
125a8b6005
13349c4c27
14200ad5d3
151382c005
hexc976385

211248005 has 8 divisors (see below), whose sum is σ = 253895712. Its totient is φ = 168733008.

The previous prime is 211247969. The next prime is 211248007. The reversal of 211248005 is 500842112.

211248005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 211248005 - 28 = 211247749 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 (211248007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29639 + ... + 36068.

It is an arithmetic number, because the mean of its divisors is an integer number (31736964).

Almost surely, 2211248005 is an apocalyptic number.

It is an amenable number.

211248005 is a deficient number, since it is larger than the sum of its proper divisors (42647707).

211248005 is an equidigital number, since it uses as much as digits as its factorization.

211248005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66355.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 211248005 is about 14534.3732235002. The cubic root of 211248005 is about 595.5673377827.

The spelling of 211248005 in words is "two hundred eleven million, two hundred forty-eight thousand, five".

Divisors: 1 5 643 3215 65707 328535 42249601 211248005