50861561 has 8 divisors (see below), whose sum is σ = 52224480. Its totient is φ = 49506912.

The previous prime is 50861521. The next prime is 50861641. The reversal of 50861561 is 16516805.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50861561 - 2⁶ = 50861497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50861521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11570 + ... + 15348.

It is an arithmetic number, because the mean of its divisors is an integer number (6528060).

Almost surely, 2^50861561 is an apocalyptic number.

It is an amenable number.

50861561 is a deficient number, since it is larger than the sum of its proper divisors (1362919).

50861561 is a wasteful number, since it uses less digits than its factorization.

50861561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 50861561 is about 7131.7291732090. The cubic root of 50861561 is about 370.5071229773.

The spelling of 50861561 in words is "fifty million, eight hundred sixty-one thousand, five hundred sixty-one".