52320513 has 8 divisors (see below), whose sum is σ = 79726528. Its totient is φ = 29897424.

The previous prime is 52320503. The next prime is 52320557. The reversal of 52320513 is 31502325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52320513 - 2⁶ = 52320449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2491453 = 52320513 / (5 + 2 + 3 + 2 + 0 + 5 + 1 + 3).

It is a self number, because there is not a number n which added to its sum of digits gives 52320513.

It is not an unprimeable number, because it can be changed into a prime (52320503) 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, 1245706 + ... + 1245747.

It is an arithmetic number, because the mean of its divisors is an integer number (9965816).

Almost surely, 2^52320513 is an apocalyptic number.

It is an amenable number.

52320513 is a deficient number, since it is larger than the sum of its proper divisors (27406015).

52320513 is a wasteful number, since it uses less digits than its factorization.

52320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491463.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 52320513 is about 7233.2919891292. The cubic root of 52320513 is about 374.0164162011.

Adding to 52320513 its reverse (31502325), we get a palindrome (83822838).

The spelling of 52320513 in words is "fifty-two million, three hundred twenty thousand, five hundred thirteen".