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40643553 = 323738069
BaseRepresentation
bin1001101100001…
…0101111100001
32211110220110210
42123002233201
540401043203
64011044333
71002315216
oct233025741
984426423
1040643553
1120a40115
12117406a9
138560752
14557db0d
15387c803
hex26c2be1

40643553 has 16 divisors (see below), whose sum is σ = 57329280. Its totient is φ = 25559424.

The previous prime is 40643539. The next prime is 40643569. The reversal of 40643553 is 35534604.

40643553 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 40643553 - 220 = 39594977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40643553.

It is not an unprimeable number, because it can be changed into a prime (40643503) 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, 1003 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (3583080).

Almost surely, 240643553 is an apocalyptic number.

It is an amenable number.

40643553 is a deficient number, since it is larger than the sum of its proper divisors (16685727).

40643553 is a wasteful number, since it uses less digits than its factorization.

40643553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 40643553 is about 6375.2296429227. The cubic root of 40643553 is about 343.8195403994.

The spelling of 40643553 in words is "forty million, six hundred forty-three thousand, five hundred fifty-three".

Divisors: 1 3 23 69 73 219 1679 5037 8069 24207 185587 556761 589037 1767111 13547851 40643553