50818505 has 4 divisors (see below), whose sum is σ = 60982212. Its totient is φ = 40654800.

The previous prime is 50818499. The next prime is 50818513. The reversal of 50818505 is 50581805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50581805 = 5 ⋅10116361.

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 41165056 = 3107^2 + 6416^2 .

It is a de Polignac number, because none of the positive numbers 2^k-50818505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5081846 + ... + 5081855.

It is an arithmetic number, because the mean of its divisors is an integer number (15245553).

Almost surely, 2^50818505 is an apocalyptic number.

It is an amenable number.

50818505 is a deficient number, since it is larger than the sum of its proper divisors (10163707).

50818505 is a wasteful number, since it uses less digits than its factorization.

50818505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10163706.

The product of its (nonzero) digits is 8000, while the sum is 32.

The square root of 50818505 is about 7128.7099113374. The cubic root of 50818505 is about 370.4025446018.

The spelling of 50818505 in words is "fifty million, eight hundred eighteen thousand, five hundred five".