52204561 has 4 divisors (see below), whose sum is σ = 52398900. Its totient is φ = 52010224.

The previous prime is 52204547. The next prime is 52204573. The reversal of 52204561 is 16540225.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 938961 + 51265600 = 969^2 + 7160^2 .

It is a cyclic number.

It is not a de Polignac number, because 52204561 - 2²⁵ = 18650129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52202561) 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, 96766 + ... + 97303.

It is an arithmetic number, because the mean of its divisors is an integer number (13099725).

Almost surely, 2^52204561 is an apocalyptic number.

It is an amenable number.

52204561 is a deficient number, since it is larger than the sum of its proper divisors (194339).

52204561 is a wasteful number, since it uses less digits than its factorization.

52204561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194338.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 52204561 is about 7225.2723824088. The cubic root of 52204561 is about 373.7399151651.

Adding to 52204561 its reverse (16540225), we get a palindrome (68744786).

The spelling of 52204561 in words is "fifty-two million, two hundred four thousand, five hundred sixty-one".