52561345 has 4 divisors (see below), whose sum is σ = 63073620. Its totient is φ = 42049072.

The previous prime is 52561343. The next prime is 52561357. The reversal of 52561345 is 54316525.

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 11498881 + 41062464 = 3391^2 + 6408^2 .

It is a cyclic number.

It is not a de Polignac number, because 52561345 - 2¹ = 52561343 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (52561343) 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, 5256130 + ... + 5256139.

It is an arithmetic number, because the mean of its divisors is an integer number (15768405).

Almost surely, 2^52561345 is an apocalyptic number.

It is an amenable number.

52561345 is a deficient number, since it is larger than the sum of its proper divisors (10512275).

52561345 is a wasteful number, since it uses less digits than its factorization.

52561345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512274.

The product of its digits is 18000, while the sum is 31.

The square root of 52561345 is about 7249.9203443900. The cubic root of 52561345 is about 374.5894054111.

The spelling of 52561345 in words is "fifty-two million, five hundred sixty-one thousand, three hundred forty-five".