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211530441 = 3223316189
BaseRepresentation
bin11001001101110…
…11001011001001
3112202000212012210
430212323023021
5413122433231
632553455333
75145656553
oct1446731311
9482025183
10211530441
11a9448a51
125aa11549
1334a93655
14201444d3
1513885a46
hexc9bb2c9

211530441 has 8 divisors (see below), whose sum is σ = 283306240. Its totient is φ = 140387472.

The previous prime is 211530427. The next prime is 211530481. The reversal of 211530441 is 144035112.

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

It is not a de Polignac number, because 211530441 - 26 = 211530377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211530481) 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, 157426 + ... + 158763.

It is an arithmetic number, because the mean of its divisors is an integer number (35413280).

Almost surely, 2211530441 is an apocalyptic number.

It is an amenable number.

211530441 is a deficient number, since it is larger than the sum of its proper divisors (71775799).

211530441 is a wasteful number, since it uses less digits than its factorization.

211530441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316415.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 211530441 is about 14544.0861177318. The cubic root of 211530441 is about 595.8326416649.

Adding to 211530441 its reverse (144035112), we get a palindrome (355565553).

The spelling of 211530441 in words is "two hundred eleven million, five hundred thirty thousand, four hundred forty-one".