52561513 has 4 divisors (see below), whose sum is σ = 53301888. Its totient is φ = 51821140.

The previous prime is 52561499. The next prime is 52561517. The reversal of 52561513 is 31516525.

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 a de Polignac number, because none of the positive numbers 2^k-52561513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52561517) 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, 370081 + ... + 370222.

It is an arithmetic number, because the mean of its divisors is an integer number (13325472).

Almost surely, 2^52561513 is an apocalyptic number.

It is an amenable number.

52561513 is a deficient number, since it is larger than the sum of its proper divisors (740375).

52561513 is an equidigital number, since it uses as much as digits as its factorization.

52561513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740374.

The product of its digits is 4500, while the sum is 28.

The square root of 52561513 is about 7249.9319307149. The cubic root of 52561513 is about 374.5898045064.

The spelling of 52561513 in words is "fifty-two million, five hundred sixty-one thousand, five hundred thirteen".