50725138 has 4 divisors (see below), whose sum is σ = 76087710. Its totient is φ = 25362568.

The previous prime is 50725123. The next prime is 50725139. The reversal of 50725138 is 83152705.

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., 36759969 + 13965169 = 6063^2 + 3737^2 .

It is not an unprimeable number, because it can be changed into a prime (50725139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12681283 + ... + 12681286.

Almost surely, 2^50725138 is an apocalyptic number.

50725138 is a deficient number, since it is larger than the sum of its proper divisors (25362572).

50725138 is a wasteful number, since it uses less digits than its factorization.

50725138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25362571.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 50725138 is about 7122.1582403089. The cubic root of 50725138 is about 370.1755631403.

The spelling of 50725138 in words is "fifty million, seven hundred twenty-five thousand, one hundred thirty-eight".