52820013 has 8 divisors (see below), whose sum is σ = 72144576. Its totient is φ = 34354400.

The previous prime is 52819999. The next prime is 52820023. The reversal of 52820013 is 31002825.

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 52820013 - 2¹⁴ = 52803629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52820023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214593 + ... + 214838.

It is an arithmetic number, because the mean of its divisors is an integer number (9018072).

Almost surely, 2^52820013 is an apocalyptic number.

It is an amenable number.

52820013 is a deficient number, since it is larger than the sum of its proper divisors (19324563).

52820013 is a wasteful number, since it uses less digits than its factorization.

52820013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429475.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 52820013 is about 7267.7378186063. The cubic root of 52820013 is about 375.2028839929.

Adding to 52820013 its reverse (31002825), we get a palindrome (83822838).

The spelling of 52820013 in words is "fifty-two million, eight hundred twenty thousand, thirteen".