50561311 has 4 divisors (see below), whose sum is σ = 51515352. Its totient is φ = 49607272.

The previous prime is 50561263. The next prime is 50561317. The reversal of 50561311 is 11316505.

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

It is a cyclic number.

It is not a de Polignac number, because 50561311 - 2¹⁷ = 50430239 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 (50561317) 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, 476941 + ... + 477046.

It is an arithmetic number, because the mean of its divisors is an integer number (12878838).

Almost surely, 2^50561311 is an apocalyptic number.

50561311 is a deficient number, since it is larger than the sum of its proper divisors (954041).

50561311 is an equidigital number, since it uses as much as digits as its factorization.

50561311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954040.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 50561311 is about 7110.6477201448. The cubic root of 50561311 is about 369.7766146116.

Adding to 50561311 its reverse (11316505), we get a palindrome (61877816).

It can be divided in two parts, 505 and 61311, that added together give a palindrome (61816).

The spelling of 50561311 in words is "fifty million, five hundred sixty-one thousand, three hundred eleven".