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42521511 = 3294710399
BaseRepresentation
bin1010001000110…
…1001110100111
32222000022112210
42202031032213
541341142021
64115214503
71024266264
oct242151647
988008483
1042521511
112200304a
12122a7433
138a6a476
14590c26b
153aede76
hex288d3a7

42521511 has 16 divisors (see below), whose sum is σ = 59904000. Its totient is φ = 26785248.

The previous prime is 42521509. The next prime is 42521537. The reversal of 42521511 is 11512524.

42521511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42521511 - 21 = 42521509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521111) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1111 + ... + 9288.

It is an arithmetic number, because the mean of its divisors is an integer number (3744000).

Almost surely, 242521511 is an apocalyptic number.

42521511 is a deficient number, since it is larger than the sum of its proper divisors (17382489).

42521511 is a wasteful number, since it uses less digits than its factorization.

42521511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10478.

The product of its digits is 400, while the sum is 21.

The square root of 42521511 is about 6520.8520148827. The cubic root of 42521511 is about 349.0354695575.

The spelling of 42521511 in words is "forty-two million, five hundred twenty-one thousand, five hundred eleven".

Divisors: 1 3 29 47 87 141 1363 4089 10399 31197 301571 488753 904713 1466259 14173837 42521511