53210513 has 4 divisors (see below), whose sum is σ = 53229108. Its totient is φ = 53191920.

The previous prime is 53210501. The next prime is 53210557. The reversal of 53210513 is 31501235.

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 42406144 + 10804369 = 6512^2 + 3287^2 .

It is a cyclic number.

It is not a de Polignac number, because 53210513 - 2⁸ = 53210257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53210593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3998 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (13307277).

Almost surely, 2^53210513 is an apocalyptic number.

It is an amenable number.

53210513 is a deficient number, since it is larger than the sum of its proper divisors (18595).

53210513 is a wasteful number, since it uses less digits than its factorization.

53210513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18594.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 53210513 is about 7294.5536532402. The cubic root of 53210513 is about 376.1252435686.

Adding to 53210513 its reverse (31501235), we get a palindrome (84711748).

The spelling of 53210513 in words is "fifty-three million, two hundred ten thousand, five hundred thirteen".