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211072906 = 21119349711
BaseRepresentation
bin11001001010010…
…11011110001010
3112201011121121001
430211023132022
5413013313111
632540005214
75142042622
oct1445133612
9481147531
10211072906
11a9166220
125a83080a
1334963315
1420065882
15137e51c1
hexc94b78a

211072906 has 16 divisors (see below), whose sum is σ = 347188608. Its totient is φ = 95443200.

The previous prime is 211072891. The next prime is 211072907. The reversal of 211072906 is 609270112.

It is a happy number.

211072906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211072907) 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, 20610 + ... + 29101.

It is an arithmetic number, because the mean of its divisors is an integer number (21699288).

Almost surely, 2211072906 is an apocalyptic number.

211072906 is a deficient number, since it is larger than the sum of its proper divisors (136115702).

211072906 is a wasteful number, since it uses less digits than its factorization.

211072906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49917.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 211072906 is about 14528.3483576076. The cubic root of 211072906 is about 595.4027412440.

The spelling of 211072906 in words is "two hundred eleven million, seventy-two thousand, nine hundred six".

Divisors: 1 2 11 22 193 386 2123 4246 49711 99422 546821 1093642 9594223 19188446 105536453 211072906