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54821213 = 1923331379
BaseRepresentation
bin1101000100100…
…0000101011101
310211011012120022
43101020011131
5103013234323
65235001525
71233654416
oct321100535
9124135508
1054821213
1128a43a97
12164392a5
13b4859b5
1473d080d
154c2d4c8
hex344815d

54821213 has 16 divisors (see below), whose sum is σ = 60556800. Its totient is φ = 49397040.

The previous prime is 54821191. The next prime is 54821227. The reversal of 54821213 is 31212845.

It is a cyclic number.

It is not a de Polignac number, because 54821213 - 216 = 54755677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54821233) 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 15 ways as a sum of consecutive naturals, for example, 144458 + ... + 144836.

It is an arithmetic number, because the mean of its divisors is an integer number (3784800).

Almost surely, 254821213 is an apocalyptic number.

It is an amenable number.

54821213 is a deficient number, since it is larger than the sum of its proper divisors (5735587).

54821213 is a wasteful number, since it uses less digits than its factorization.

54821213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its digits is 1920, while the sum is 26.

The square root of 54821213 is about 7404.1348583072. The cubic root of 54821213 is about 379.8827269696.

The spelling of 54821213 in words is "fifty-four million, eight hundred twenty-one thousand, two hundred thirteen".

Divisors: 1 19 23 331 379 437 6289 7201 7613 8717 125449 144647 165623 2383531 2885327 54821213