52442561 has 4 divisors (see below), whose sum is σ = 52522800. Its totient is φ = 52362324.

The previous prime is 52442557. The next prime is 52442581. The reversal of 52442561 is 16524425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52442561 - 2² = 52442557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52442521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39131 + ... + 40448.

It is an arithmetic number, because the mean of its divisors is an integer number (13130700).

Almost surely, 2^52442561 is an apocalyptic number.

It is an amenable number.

52442561 is a deficient number, since it is larger than the sum of its proper divisors (80239).

52442561 is an equidigital number, since it uses as much as digits as its factorization.

52442561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80238.

The product of its digits is 9600, while the sum is 29.

The square root of 52442561 is about 7241.7236207964. The cubic root of 52442561 is about 374.3070129133.

Adding to 52442561 its reverse (16524425), we get a palindrome (68966986).

The spelling of 52442561 in words is "fifty-two million, four hundred forty-two thousand, five hundred sixty-one".