50781845 has 4 divisors (see below), whose sum is σ = 60938220. Its totient is φ = 40625472.

The previous prime is 50781823. The next prime is 50781847. The reversal of 50781845 is 54818705.

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 27520516 + 23261329 = 5246^2 + 4823^2 .

It is a cyclic number.

It is not a de Polignac number, because 50781845 - 2⁸ = 50781589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50781799 and 50781808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50781847) 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, 5078180 + ... + 5078189.

It is an arithmetic number, because the mean of its divisors is an integer number (15234555).

Almost surely, 2^50781845 is an apocalyptic number.

It is an amenable number.

50781845 is a deficient number, since it is larger than the sum of its proper divisors (10156375).

50781845 is a wasteful number, since it uses less digits than its factorization.

50781845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156374.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 50781845 is about 7126.1381547090. The cubic root of 50781845 is about 370.3134548510.

The spelling of 50781845 in words is "fifty million, seven hundred eighty-one thousand, eight hundred forty-five".