52445421 has 32 divisors (see below), whose sum is σ = 90272000. Its totient is φ = 29471040.

The previous prime is 52445411. The next prime is 52445429. The reversal of 52445421 is 12454425.

It is not a de Polignac number, because 52445421 - 2¹⁰ = 52444397 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52445429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9255 + ... + 13803.

It is an arithmetic number, because the mean of its divisors is an integer number (2821000).

Almost surely, 2^52445421 is an apocalyptic number.

It is an amenable number.

52445421 is a deficient number, since it is larger than the sum of its proper divisors (37826579).

52445421 is a wasteful number, since it uses less digits than its factorization.

52445421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626 (or 4620 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 52445421 is about 7241.9210849056. The cubic root of 52445421 is about 374.3138171742.

Adding to 52445421 its reverse (12454425), we get a palindrome (64899846).

The spelling of 52445421 in words is "fifty-two million, four hundred forty-five thousand, four hundred twenty-one".