50991471 has 16 divisors (see below), whose sum is σ = 75755520. Its totient is φ = 33898680.

The previous prime is 50991463. The next prime is 50991491. The reversal of 50991471 is 17419905.

50991471 is a `hidden beast` number, since 509 + 9 + 147 + 1 = 666.

It is not a de Polignac number, because 50991471 - 2³ = 50991463 is a prime.

It is a super-3 number, since 3×50991471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50991401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7876 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (4734720).

Almost surely, 2^50991471 is an apocalyptic number.

50991471 is a deficient number, since it is larger than the sum of its proper divisors (24764049).

50991471 is a wasteful number, since it uses less digits than its factorization.

50991471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323 (or 5317 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 50991471 is about 7140.8312541328. The cubic root of 50991471 is about 370.8223030960.

The spelling of 50991471 in words is "fifty million, nine hundred ninety-one thousand, four hundred seventy-one".