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42205521 = 314879461
BaseRepresentation
bin1010000100000…
…0000101010001
32221102021002110
42201000011101
541301034041
64104335533
71021512111
oct241000521
987367073
1042205521
11219076a6
12121745a9
1389896a7
145869041
153a8a516
hex2840151

42205521 has 8 divisors (see below), whose sum is σ = 56317824. Its totient is φ = 28115120.

The previous prime is 42205481. The next prime is 42205547. The reversal of 42205521 is 12550224.

It is a happy number.

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 42205521 - 213 = 42197329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42205571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 9191.

It is an arithmetic number, because the mean of its divisors is an integer number (7039728).

Almost surely, 242205521 is an apocalyptic number.

It is an amenable number.

42205521 is a deficient number, since it is larger than the sum of its proper divisors (14112303).

42205521 is a wasteful number, since it uses less digits than its factorization.

42205521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10951.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42205521 is about 6496.5776374950. The cubic root of 42205521 is about 348.1687235076.

Adding to 42205521 its reverse (12550224), we get a palindrome (54755745).

The spelling of 42205521 in words is "forty-two million, two hundred five thousand, five hundred twenty-one".

Divisors: 1 3 1487 4461 9461 28383 14068507 42205521