50811987 has 8 divisors (see below), whose sum is σ = 67809280. Its totient is φ = 33844680.

The previous prime is 50811979. The next prime is 50812043. The reversal of 50811987 is 78911805.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50811987 - 2³ = 50811979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50811967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3187 + ... + 10572.

It is an arithmetic number, because the mean of its divisors is an integer number (8476160).

Almost surely, 2^50811987 is an apocalyptic number.

50811987 is a deficient number, since it is larger than the sum of its proper divisors (16997293).

50811987 is a wasteful number, since it uses less digits than its factorization.

50811987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14993.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 50811987 is about 7128.2527312098. The cubic root of 50811987 is about 370.3867079362.

The spelling of 50811987 in words is "fifty million, eight hundred eleven thousand, nine hundred eighty-seven".