50387131 has 4 divisors (see below), whose sum is σ = 50569312. Its totient is φ = 50204952.

The previous prime is 50387111. The next prime is 50387143. The reversal of 50387131 is 13178305.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50387131 is a prime.

It is a super-2 number, since 2×50387131² = 5077725940822322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50387131.

It is not an unprimeable number, because it can be changed into a prime (50387111) 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, 90675 + ... + 91228.

It is an arithmetic number, because the mean of its divisors is an integer number (12642328).

Almost surely, 2^50387131 is an apocalyptic number.

50387131 is a deficient number, since it is larger than the sum of its proper divisors (182181).

50387131 is a wasteful number, since it uses less digits than its factorization.

50387131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182180.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 50387131 is about 7098.3893243468. The cubic root of 50387131 is about 369.3515083314.

The spelling of 50387131 in words is "fifty million, three hundred eighty-seven thousand, one hundred thirty-one".