50815985 has 16 divisors (see below), whose sum is σ = 68323392. Its totient is φ = 35956800.

The previous prime is 50815979. The next prime is 50815991. The reversal of 50815985 is 58951805.

It is an interprime number because it is at equal distance from previous prime (50815979) and next prime (50815991).

It is not a de Polignac number, because 50815985 - 2⁴ = 50815969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10451 + ... + 14520.

It is an arithmetic number, because the mean of its divisors is an integer number (4270212).

Almost surely, 2^50815985 is an apocalyptic number.

50815985 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

50815985 is a deficient number, since it is larger than the sum of its proper divisors (17507407).

50815985 is a wasteful number, since it uses less digits than its factorization.

50815985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25024.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 50815985 is about 7128.5331590728. The cubic root of 50815985 is about 370.3964219644.

The spelling of 50815985 in words is "fifty million, eight hundred fifteen thousand, nine hundred eighty-five".