50561997 has 8 divisors (see below), whose sum is σ = 68558880. Its totient is φ = 33136560.

The previous prime is 50561971. The next prime is 50562037. The reversal of 50561997 is 79916505.

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

It is not a de Polignac number, because 50561997 - 2¹⁰ = 50560973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50560997) 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, 142654 + ... + 143007.

It is an arithmetic number, because the mean of its divisors is an integer number (8569860).

Almost surely, 2^50561997 is an apocalyptic number.

It is an amenable number.

50561997 is a deficient number, since it is larger than the sum of its proper divisors (17996883).

50561997 is a wasteful number, since it uses less digits than its factorization.

50561997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285723.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 50561997 is about 7110.6959574995. The cubic root of 50561997 is about 369.7782869418.

The spelling of 50561997 in words is "fifty million, five hundred sixty-one thousand, nine hundred ninety-seven".