50813813 has 4 divisors (see below), whose sum is σ = 51179520. Its totient is φ = 50448108.

The previous prime is 50813747. The next prime is 50813821. The reversal of 50813813 is 31831805.

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: 31831805 = 5 ⋅6366361.

It is a cyclic number.

It is not a de Polignac number, because 50813813 - 2¹⁴ = 50797429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50816813) 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, 182645 + ... + 182922.

It is an arithmetic number, because the mean of its divisors is an integer number (12794880).

Almost surely, 2^50813813 is an apocalyptic number.

It is an amenable number.

50813813 is a deficient number, since it is larger than the sum of its proper divisors (365707).

50813813 is a wasteful number, since it uses less digits than its factorization.

50813813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365706.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 50813813 is about 7128.3808119376. The cubic root of 50813813 is about 370.3911446716.

The spelling of 50813813 in words is "fifty million, eight hundred thirteen thousand, eight hundred thirteen".