50170138 has 4 divisors (see below), whose sum is σ = 75255210. Its totient is φ = 25085068.

The previous prime is 50170129. The next prime is 50170139. The reversal of 50170138 is 83107105.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45387169 + 4782969 = 6737^2 + 2187^2 .

It is not an unprimeable number, because it can be changed into a prime (50170139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12542533 + ... + 12542536.

Almost surely, 2^50170138 is an apocalyptic number.

50170138 is a deficient number, since it is larger than the sum of its proper divisors (25085072).

50170138 is a wasteful number, since it uses less digits than its factorization.

50170138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25085071.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 50170138 is about 7083.0881683063. The cubic root of 50170138 is about 368.8205392968.

The spelling of 50170138 in words is "fifty million, one hundred seventy thousand, one hundred thirty-eight".