50021311 has 4 divisors (see below), whose sum is σ = 50036400. Its totient is φ = 50006224.

The previous prime is 50021287. The next prime is 50021339. The reversal of 50021311 is 11312005.

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 50021311 - 2⁷ = 50021183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50021291 and 50021300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50021351) 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, 166 + ... + 10003.

It is an arithmetic number, because the mean of its divisors is an integer number (12509100).

Almost surely, 2^50021311 is an apocalyptic number.

50021311 is a deficient number, since it is larger than the sum of its proper divisors (15089).

50021311 is a wasteful number, since it uses less digits than its factorization.

50021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15088.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 50021311 is about 7072.5745665917. The cubic root of 50021311 is about 368.4554826932.

Adding to 50021311 its reverse (11312005), we get a palindrome (61333316).

The spelling of 50021311 in words is "fifty million, twenty-one thousand, three hundred eleven".