50700821 has 4 divisors (see below), whose sum is σ = 51532044. Its totient is φ = 49869600.

The previous prime is 50700781. The next prime is 50700847. The reversal of 50700821 is 12800705.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15760900 + 34939921 = 3970^2 + 5911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50700821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50700121) 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, 415520 + ... + 415641.

It is an arithmetic number, because the mean of its divisors is an integer number (12883011).

Almost surely, 2^50700821 is an apocalyptic number.

It is an amenable number.

50700821 is a deficient number, since it is larger than the sum of its proper divisors (831223).

50700821 is an equidigital number, since it uses as much as digits as its factorization.

50700821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831222.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 50700821 is about 7120.4508986440. The cubic root of 50700821 is about 370.1164011658.

The spelling of 50700821 in words is "fifty million, seven hundred thousand, eight hundred twenty-one".