50143561 has 8 divisors (see below), whose sum is σ = 54065480. Its totient is φ = 46230912.

The previous prime is 50143559. The next prime is 50143573. The reversal of 50143561 is 16534105.

50143561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4161600 + 45981961 = 2040^2 + 6781^2 .

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

It is not a de Polignac number, because 50143561 - 2¹ = 50143559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50143061) 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 7 ways as a sum of consecutive naturals, for example, 12445 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (6758185).

Almost surely, 2^50143561 is an apocalyptic number.

It is an amenable number.

50143561 is a deficient number, since it is larger than the sum of its proper divisors (3921919).

50143561 is a wasteful number, since it uses less digits than its factorization.

50143561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635.

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

The square root of 50143561 is about 7081.2118313181. The cubic root of 50143561 is about 368.7554017786.

Adding to 50143561 its reverse (16534105), we get a palindrome (66677666).

The spelling of 50143561 in words is "fifty million, one hundred forty-three thousand, five hundred sixty-one".