5210521 has 8 divisors (see below), whose sum is σ = 5330664. Its totient is φ = 5091840.

The previous prime is 5210519. The next prime is 5210531. The reversal of 5210521 is 1250125.

It can be written as a sum of positive squares in 4 ways, for example, as 648025 + 4562496 = 805^2 + 2136^2 .

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 5210521 - 2¹ = 5210519 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

5210521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5210495 and 5210504.

It is not an unprimeable number, because it can be changed into a prime (5210531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9741 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (666333).

Almost surely, 2^5210521 is an apocalyptic number.

It is an amenable number.

5210521 is a deficient number, since it is larger than the sum of its proper divisors (120143).

5210521 is a wasteful number, since it uses less digits than its factorization.

5210521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 5210521 is about 2282.6565663717. The cubic root of 5210521 is about 173.3645846840.

Adding to 5210521 its reverse (1250125), we get a palindrome (6460646).

The spelling of 5210521 in words is "five million, two hundred ten thousand, five hundred twenty-one".