6520563 has 48 divisors (see below), whose sum is σ = 11531520. Its totient is φ = 3471552.

The previous prime is 6520541. The next prime is 6520567. The reversal of 6520563 is 3650256.

6520563 is a `hidden beast` number, since 652 + 0 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 6520563 - 2⁶ = 6520499 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁶ + 5 + 2¹³ + 0 + 5⁵ + 6⁸ + 3¹⁴ .

6520563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6520567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78520 + ... + 78602.

It is an arithmetic number, because the mean of its divisors is an integer number (240240).

Almost surely, 2^6520563 is an apocalyptic number.

6520563 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6520563 is a deficient number, since it is larger than the sum of its proper divisors (5010957).

6520563 is a wasteful number, since it uses less digits than its factorization.

6520563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 6520563 is about 2553.5393084893. The cubic root of 6520563 is about 186.8221497211.

The spelling of 6520563 in words is "six million, five hundred twenty thousand, five hundred sixty-three".