50511561 has 4 divisors (see below), whose sum is σ = 67348752. Its totient is φ = 33674372.

The previous prime is 50511529. The next prime is 50511563. The reversal of 50511561 is 16511505.

50511561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 50511561 - 2⁵ = 50511529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50511563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8418591 + ... + 8418596.

It is an arithmetic number, because the mean of its divisors is an integer number (16837188).

Almost surely, 2^50511561 is an apocalyptic number.

It is an amenable number.

50511561 is a deficient number, since it is larger than the sum of its proper divisors (16837191).

50511561 is a wasteful number, since it uses less digits than its factorization.

50511561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16837190.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 50511561 is about 7107.1485843480. The cubic root of 50511561 is about 369.6552937621.

The spelling of 50511561 in words is "fifty million, five hundred eleven thousand, five hundred sixty-one".