50550091 has 4 divisors (see below), whose sum is σ = 51242632. Its totient is φ = 49857552.

The previous prime is 50550077. The next prime is 50550107. The reversal of 50550091 is 19005505.

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 50550091 - 2⁷ = 50549963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50550001) 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, 346161 + ... + 346306.

It is an arithmetic number, because the mean of its divisors is an integer number (12810658).

Almost surely, 2^50550091 is an apocalyptic number.

50550091 is a deficient number, since it is larger than the sum of its proper divisors (692541).

50550091 is an equidigital number, since it uses as much as digits as its factorization.

50550091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692540.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 50550091 is about 7109.8587187088. The cubic root of 50550091 is about 369.7492603595.

Adding to 50550091 its reverse (19005505), we get a palindrome (69555596).

The spelling of 50550091 in words is "fifty million, five hundred fifty thousand, ninety-one".