52445521 has 8 divisors (see below), whose sum is σ = 54238464. Its totient is φ = 50658960.

The previous prime is 52445507. The next prime is 52445531. The reversal of 52445521 is 12554425.

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

It is not a de Polignac number, because 52445521 - 2⁵ = 52445489 is a prime.

It is a super-2 number, since 2×52445521² = 5501065345922882, which contains 22 as substring.

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 52445521.

It is not an unprimeable number, because it can be changed into a prime (52445531) 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, 19935 + ... + 22411.

It is an arithmetic number, because the mean of its divisors is an integer number (6779808).

Almost surely, 2^52445521 is an apocalyptic number.

It is an amenable number.

52445521 is a deficient number, since it is larger than the sum of its proper divisors (1792943).

52445521 is a wasteful number, since it uses less digits than its factorization.

52445521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191.

The product of its digits is 8000, while the sum is 28.

The square root of 52445521 is about 7241.9279891476. The cubic root of 52445521 is about 374.3140550809.

Adding to 52445521 its reverse (12554425), we get a palindrome (64999946).

The spelling of 52445521 in words is "fifty-two million, four hundred forty-five thousand, five hundred twenty-one".