50538913 has 4 divisors (see below), whose sum is σ = 50727060. Its totient is φ = 50350768.

The previous prime is 50538893. The next prime is 50538923. The reversal of 50538913 is 31983505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31983505 = 5 ⋅6396701.

It can be written as a sum of positive squares in 2 ways, for example, as 26450449 + 24088464 = 5143^2 + 4908^2 .

It is a cyclic number.

It is not a de Polignac number, because 50538913 - 2⁵ = 50538881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50538923) 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, 93670 + ... + 94207.

It is an arithmetic number, because the mean of its divisors is an integer number (12681765).

Almost surely, 2^50538913 is an apocalyptic number.

It is an amenable number.

50538913 is a deficient number, since it is larger than the sum of its proper divisors (188147).

50538913 is a wasteful number, since it uses less digits than its factorization.

50538913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188146.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 50538913 is about 7109.0725836778. The cubic root of 50538913 is about 369.7220044777.

The spelling of 50538913 in words is "fifty million, five hundred thirty-eight thousand, nine hundred thirteen".