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53415521 = 97754673
BaseRepresentation
bin1100101111000…
…0111001100001
310201111210022122
43023300321201
5102133244041
65144514025
71216011245
oct313607141
9121453278
1053415521
1128173965
1215a7b915
13b0b2c23
147146425
154a51c4b
hex32f0e61

53415521 has 4 divisors (see below), whose sum is σ = 53471172. Its totient is φ = 53359872.

The previous prime is 53415463. The next prime is 53415529. The reversal of 53415521 is 12551435.

53415521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29757025 + 23658496 = 5455^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 53415521 - 210 = 53414497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53415529) 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 3 ways as a sum of consecutive naturals, for example, 26360 + ... + 28313.

It is an arithmetic number, because the mean of its divisors is an integer number (13367793).

Almost surely, 253415521 is an apocalyptic number.

It is an amenable number.

53415521 is a deficient number, since it is larger than the sum of its proper divisors (55651).

53415521 is an equidigital number, since it uses as much as digits as its factorization.

53415521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55650.

The product of its digits is 3000, while the sum is 26.

The square root of 53415521 is about 7308.5922721137. The cubic root of 53415521 is about 376.6076662054.

Adding to 53415521 its reverse (12551435), we get a palindrome (65966956).

The spelling of 53415521 in words is "fifty-three million, four hundred fifteen thousand, five hundred twenty-one".

Divisors: 1 977 54673 53415521