50920821 has 12 divisors (see below), whose sum is σ = 84059872. Its totient is φ = 29097576.

The previous prime is 50920813. The next prime is 50920847. The reversal of 50920821 is 12802905.

It is not a de Polignac number, because 50920821 - 2³ = 50920813 is a prime.

It is a super-2 number, since 2×50920821² = 5185860022628082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50920801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404071 + ... + 404196.

Almost surely, 2^50920821 is an apocalyptic number.

It is an amenable number.

50920821 is a deficient number, since it is larger than the sum of its proper divisors (33139051).

50920821 is a wasteful number, since it uses less digits than its factorization.

50920821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808280 (or 808277 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 50920821 is about 7135.8826363667. The cubic root of 50920821 is about 370.6509626468.

The spelling of 50920821 in words is "fifty million, nine hundred twenty thousand, eight hundred twenty-one".