50101821 has 80 divisors (see below), whose sum is σ = 96877440. Its totient is φ = 25038720.

The previous prime is 50101781. The next prime is 50101823. The reversal of 50101821 is 12810105.

It is not a de Polignac number, because 50101821 - 2¹⁰ = 50100797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50101794 and 50101803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50101823) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 180735 + ... + 181011.

It is an arithmetic number, because the mean of its divisors is an integer number (1210968).

Almost surely, 2^50101821 is an apocalyptic number.

It is an amenable number.

50101821 is a deficient number, since it is larger than the sum of its proper divisors (46775619).

50101821 is a wasteful number, since it uses less digits than its factorization.

50101821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 50101821 is about 7078.2639820792. The cubic root of 50101821 is about 368.6530548177.

Adding to 50101821 its reverse (12810105), we get a palindrome (62911926).

The spelling of 50101821 in words is "fifty million, one hundred one thousand, eight hundred twenty-one".