52520321 has 8 divisors (see below), whose sum is σ = 60177600. Its totient is φ = 44901648.

The previous prime is 52520317. The next prime is 52520341. The reversal of 52520321 is 12302525.

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 52520321 - 2² = 52520317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52520293 and 52520302.

It is not an unprimeable number, because it can be changed into a prime (52520341) 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, 6671 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (7522200).

Almost surely, 2^52520321 is an apocalyptic number.

It is an amenable number.

52520321 is a deficient number, since it is larger than the sum of its proper divisors (7657279).

52520321 is a wasteful number, since it uses less digits than its factorization.

52520321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19303.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 52520321 is about 7247.0905196499. The cubic root of 52520321 is about 374.4919246769.

Adding to 52520321 its reverse (12302525), we get a palindrome (64822846).

The spelling of 52520321 in words is "fifty-two million, five hundred twenty thousand, three hundred twenty-one".