50448781 has 4 divisors (see below), whose sum is σ = 53104000. Its totient is φ = 47793564.

The previous prime is 50448779. The next prime is 50448787. The reversal of 50448781 is 18784405.

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 50448781 - 2¹ = 50448779 is a prime.

It is a super-2 number, since 2×50448781² = 5090159008771922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50448781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50448787) 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, 1327581 + ... + 1327618.

It is an arithmetic number, because the mean of its divisors is an integer number (13276000).

Almost surely, 2^50448781 is an apocalyptic number.

It is an amenable number.

50448781 is a deficient number, since it is larger than the sum of its proper divisors (2655219).

50448781 is a wasteful number, since it uses less digits than its factorization.

50448781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655218.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 50448781 is about 7102.7305312816. The cubic root of 50448781 is about 369.5020840807.

The spelling of 50448781 in words is "fifty million, four hundred forty-eight thousand, seven hundred eighty-one".