52006561 has 4 divisors (see below), whose sum is σ = 53684224. Its totient is φ = 50328900.

The previous prime is 52006547. The next prime is 52006567. The reversal of 52006561 is 16560025.

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 52006561 - 2⁵ = 52006529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52006567) 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, 838785 + ... + 838846.

It is an arithmetic number, because the mean of its divisors is an integer number (13421056).

Almost surely, 2^52006561 is an apocalyptic number.

It is an amenable number.

52006561 is a deficient number, since it is larger than the sum of its proper divisors (1677663).

52006561 is a wasteful number, since it uses less digits than its factorization.

52006561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677662.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 52006561 is about 7211.5574600775. The cubic root of 52006561 is about 373.2668131021.

Adding to 52006561 its reverse (16560025), we get a palindrome (68566586).

The spelling of 52006561 in words is "fifty-two million, six thousand, five hundred sixty-one".