50160221561 has 4 divisors (see below), whose sum is σ = 50247154932. Its totient is φ = 50073288192.

The previous prime is 50160221537. The next prime is 50160221563. The reversal of 50160221561 is 16512206105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16512206105 = 5 ⋅3302441221.

It can be written as a sum of positive squares in 2 ways, for example, as 31762011961 + 18398209600 = 178219^2 + 135640^2 .

It is a cyclic number.

It is not a de Polignac number, because 50160221561 - 2³⁰ = 49086479737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50160221563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43465820 + ... + 43466973.

It is an arithmetic number, because the mean of its divisors is an integer number (12561788733).

Almost surely, 2^50160221561 is an apocalyptic number.

It is an amenable number.

50160221561 is a deficient number, since it is larger than the sum of its proper divisors (86933371).

50160221561 is an equidigital number, since it uses as much as digits as its factorization.

50160221561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86933370.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 50160221561 its reverse (16512206105), we get a palindrome (66672427666).

The spelling of 50160221561 in words is "fifty billion, one hundred sixty million, two hundred twenty-one thousand, five hundred sixty-one".