50861209 has 4 divisors (see below), whose sum is σ = 58127104. Its totient is φ = 43595316.

The previous prime is 50861207. The next prime is 50861219. The reversal of 50861209 is 90216805.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50861209 - 2¹ = 50861207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50861201) 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, 3632937 + ... + 3632950.

It is an arithmetic number, because the mean of its divisors is an integer number (14531776).

Almost surely, 2^50861209 is an apocalyptic number.

It is an amenable number.

50861209 is a deficient number, since it is larger than the sum of its proper divisors (7265895).

50861209 is an equidigital number, since it uses as much as digits as its factorization.

50861209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7265894.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 50861209 is about 7131.7044947193. The cubic root of 50861209 is about 370.5062682466.

The spelling of 50861209 in words is "fifty million, eight hundred sixty-one thousand, two hundred nine".