52445581 has 2 divisors, whose sum is σ = 52445582. Its totient is φ = 52445580.

The previous prime is 52445579. The next prime is 52445593. The reversal of 52445581 is 18554425.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 5248681 = 6870^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 52445581 - 2¹ = 52445579 is a prime.

It is a super-2 number, since 2×52445581² = 5501077932855122, which contains 22 as substring.

Together with 52445579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52445531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26222790 + 26222791.

It is an arithmetic number, because the mean of its divisors is an integer number (26222791).

Almost surely, 2^52445581 is an apocalyptic number.

It is an amenable number.

52445581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52445581 is an equidigital number, since it uses as much as digits as its factorization.

52445581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32000, while the sum is 34.

The square root of 52445581 is about 7241.9321316897. The cubic root of 52445581 is about 374.3141978248.

The spelling of 52445581 in words is "fifty-two million, four hundred forty-five thousand, five hundred eighty-one".