50581313 has 4 divisors (see below), whose sum is σ = 50595540. Its totient is φ = 50567088.

The previous prime is 50581303. The next prime is 50581319. The reversal of 50581313 is 31318505.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 38588944 + 11992369 = 6212^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 50581313 - 2¹⁴ = 50564929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50581319) 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, 3383 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (12648885).

Almost surely, 2^50581313 is an apocalyptic number.

It is an amenable number.

50581313 is a deficient number, since it is larger than the sum of its proper divisors (14227).

50581313 is an equidigital number, since it uses as much as digits as its factorization.

50581313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 50581313 is about 7112.0540633491. The cubic root of 50581313 is about 369.8253692595.

Adding to 50581313 its reverse (31318505), we get a palindrome (81899818).

It can be divided in two parts, 505 and 81313, that added together give a palindrome (81818).

The spelling of 50581313 in words is "fifty million, five hundred eighty-one thousand, three hundred thirteen".