50815819 has 4 divisors (see below), whose sum is σ = 50833944. Its totient is φ = 50797696.

The previous prime is 50815783. The next prime is 50815841. The reversal of 50815819 is 91851805.

50815819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91851805 = 5 ⋅18370361.

It is a cyclic number.

It is not a de Polignac number, because 50815819 - 2⁹ = 50815307 is a prime.

It is a super-2 number, since 2×50815819² = 5164494921281522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50815889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3862 + ... + 10795.

It is an arithmetic number, because the mean of its divisors is an integer number (12708486).

Almost surely, 2^50815819 is an apocalyptic number.

50815819 is a deficient number, since it is larger than the sum of its proper divisors (18125).

50815819 is a wasteful number, since it uses less digits than its factorization.

50815819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18124.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 50815819 is about 7128.5215157142. The cubic root of 50815819 is about 370.3960186407.

The spelling of 50815819 in words is "fifty million, eight hundred fifteen thousand, eight hundred nineteen".