53527321 has 4 divisors (see below), whose sum is σ = 53542692. Its totient is φ = 53511952.

The previous prime is 53527289. The next prime is 53527333. The reversal of 53527321 is 12372535.

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 41024025 + 12503296 = 6405^2 + 3536^2 .

It is a cyclic number.

It is not a de Polignac number, because 53527321 - 2⁵ = 53527289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53527321.

It is not an unprimeable number, because it can be changed into a prime (53527381) 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 3 ways as a sum of consecutive naturals, for example, 315 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (13385673).

Almost surely, 2^53527321 is an apocalyptic number.

It is an amenable number.

53527321 is a deficient number, since it is larger than the sum of its proper divisors (15371).

53527321 is a wasteful number, since it uses less digits than its factorization.

53527321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15370.

The product of its digits is 6300, while the sum is 28.

The square root of 53527321 is about 7316.2368058996. The cubic root of 53527321 is about 376.8702328089.

Adding to 53527321 its reverse (12372535), we get a palindrome (65899856).

The spelling of 53527321 in words is "fifty-three million, five hundred twenty-seven thousand, three hundred twenty-one".