50278561 has 4 divisors (see below), whose sum is σ = 51130800. Its totient is φ = 49426324.

The previous prime is 50278477. The next prime is 50278577. The reversal of 50278561 is 16587205.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16587205 = 5 ⋅3317441.

It is a cyclic number.

It is not a de Polignac number, because 50278561 - 2⁷ = 50278433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50279561) 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, 426031 + ... + 426148.

It is an arithmetic number, because the mean of its divisors is an integer number (12782700).

Almost surely, 2^50278561 is an apocalyptic number.

It is an amenable number.

50278561 is a deficient number, since it is larger than the sum of its proper divisors (852239).

50278561 is an equidigital number, since it uses as much as digits as its factorization.

50278561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852238.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 50278561 is about 7090.7376908189. The cubic root of 50278561 is about 369.0860349276.

The spelling of 50278561 in words is "fifty million, two hundred seventy-eight thousand, five hundred sixty-one".