52545321 has 16 divisors (see below), whose sum is σ = 77956800. Its totient is φ = 34979904.

The previous prime is 52545319. The next prime is 52545329. The reversal of 52545321 is 12354525.

It is a happy number.

It is not a de Polignac number, because 52545321 - 2¹ = 52545319 is a prime.

It is a super-3 number, since 3×52545321³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52545329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34545 + ... + 36033.

It is an arithmetic number, because the mean of its divisors is an integer number (4872300).

Almost surely, 2^52545321 is an apocalyptic number.

It is an amenable number.

52545321 is a deficient number, since it is larger than the sum of its proper divisors (25411479).

52545321 is a wasteful number, since it uses less digits than its factorization.

52545321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805 (or 2799 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 52545321 is about 7248.8151445598. The cubic root of 52545321 is about 374.5513354143.

Adding to 52545321 its reverse (12354525), we get a palindrome (64899846).

The spelling of 52545321 in words is "fifty-two million, five hundred forty-five thousand, three hundred twenty-one".