50021161 has 4 divisors (see below), whose sum is σ = 50280532. Its totient is φ = 49761792.

The previous prime is 50021149. The next prime is 50021173. The reversal of 50021161 is 16112005.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (50021149) and next prime (50021173).

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 33860761 = 4020^2 + 5819^2 .

It is a cyclic number.

It is not a de Polignac number, because 50021161 - 2⁷ = 50021033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50021261) 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, 129396 + ... + 129781.

It is an arithmetic number, because the mean of its divisors is an integer number (12570133).

Almost surely, 2^50021161 is an apocalyptic number.

It is an amenable number.

50021161 is a deficient number, since it is larger than the sum of its proper divisors (259371).

50021161 is a wasteful number, since it uses less digits than its factorization.

50021161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259370.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 50021161 is about 7072.5639622417. The cubic root of 50021161 is about 368.4551143943.

Adding to 50021161 its reverse (16112005), we get a palindrome (66133166).

The spelling of 50021161 in words is "fifty million, twenty-one thousand, one hundred sixty-one".