50800781 has 4 divisors (see below), whose sum is σ = 50935200. Its totient is φ = 50666364.

The previous prime is 50800751. The next prime is 50800801. The reversal of 50800781 is 18700805.

It is a happy number.

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: 18700805 = 5 ⋅3740161.

It is a cyclic number.

It is not a de Polignac number, because 50800781 - 2²² = 46606477 is a prime.

It is a super-2 number, since 2×50800781² = 5161438700419922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50800751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66641 + ... + 67398.

It is an arithmetic number, because the mean of its divisors is an integer number (12733800).

Almost surely, 2^50800781 is an apocalyptic number.

50800781 is the 3188-th centered decagonal number.

It is an amenable number.

50800781 is a deficient number, since it is larger than the sum of its proper divisors (134419).

50800781 is a wasteful number, since it uses less digits than its factorization.

50800781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134418.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 50800781 is about 7127.4666607428. The cubic root of 50800781 is about 370.3594777566.

The spelling of 50800781 in words is "fifty million, eight hundred thousand, seven hundred eighty-one".