50615991 has 24 divisors (see below), whose sum is σ = 76518000. Its totient is φ = 32199552.

The previous prime is 50615959. The next prime is 50616001. The reversal of 50615991 is 19951605.

50615991 is a `hidden beast` number, since 5 + 0 + 61 + 599 + 1 = 666.

50615991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 50615991 - 2⁵ = 50615959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50615941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22140 + ... + 24318.

It is an arithmetic number, because the mean of its divisors is an integer number (3188250).

Almost surely, 2^50615991 is an apocalyptic number.

50615991 is a deficient number, since it is larger than the sum of its proper divisors (25902009).

50615991 is a wasteful number, since it uses less digits than its factorization.

50615991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 50615991 is about 7114.4916192234. The cubic root of 50615991 is about 369.9098660408.

The spelling of 50615991 in words is "fifty million, six hundred fifteen thousand, nine hundred ninety-one".