50218705 has 4 divisors (see below), whose sum is σ = 60262452. Its totient is φ = 40174960.

The previous prime is 50218703. The next prime is 50218709. The reversal of 50218705 is 50781205.

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 27217089 + 23001616 = 5217^2 + 4796^2 .

It is not a de Polignac number, because 50218705 - 2¹ = 50218703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50218703) 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, 5021866 + ... + 5021875.

It is an arithmetic number, because the mean of its divisors is an integer number (15065613).

Almost surely, 2^50218705 is an apocalyptic number.

It is an amenable number.

50218705 is a deficient number, since it is larger than the sum of its proper divisors (10043747).

50218705 is a wasteful number, since it uses less digits than its factorization.

50218705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043746.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 50218705 is about 7086.5157164858. The cubic root of 50218705 is about 368.9395126603.

Subtracting 50218705 from its reverse (50781205), we obtain a square (562500 = 750²).

The spelling of 50218705 in words is "fifty million, two hundred eighteen thousand, seven hundred five".