52561511 has 4 divisors (see below), whose sum is σ = 53082024. Its totient is φ = 52041000.

The previous prime is 52561499. The next prime is 52561517. The reversal of 52561511 is 11516525.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52561511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52561517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260105 + ... + 260306.

It is an arithmetic number, because the mean of its divisors is an integer number (13270506).

Almost surely, 2^52561511 is an apocalyptic number.

52561511 is a deficient number, since it is larger than the sum of its proper divisors (520513).

52561511 is a wasteful number, since it uses less digits than its factorization.

52561511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520512.

The product of its digits is 1500, while the sum is 26.

The square root of 52561511 is about 7249.9317927826. The cubic root of 52561511 is about 374.5897997553.

The spelling of 52561511 in words is "fifty-two million, five hundred sixty-one thousand, five hundred eleven".