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51581406 = 238596901
BaseRepresentation
bin1100010011000…
…1000111011110
310121001121101110
43010301013132
5101201101111
65041322450
71164302052
oct304610736
9117047343
1051581406
1127130968
1215336426
13a8c0156
146bc9c62
1547dd5a6
hex31311de

51581406 has 8 divisors (see below), whose sum is σ = 103162824. Its totient is φ = 17193800.

The previous prime is 51581393. The next prime is 51581423. The reversal of 51581406 is 60418515.

51581406 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.

51581406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298445 + ... + 4298456.

It is an arithmetic number, because the mean of its divisors is an integer number (12895353).

Almost surely, 251581406 is an apocalyptic number.

51581406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51581406 is a wasteful number, since it uses less digits than its factorization.

51581406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8596906.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 51581406 is about 7182.0196323875. The cubic root of 51581406 is about 372.2468733589.

The spelling of 51581406 in words is "fifty-one million, five hundred eighty-one thousand, four hundred six".

Divisors: 1 2 3 6 8596901 17193802 25790703 51581406