50990120217 has 20 divisors (see below), whose sum is σ = 76185319056. Its totient is φ = 33986767320.

The previous prime is 50990120213. The next prime is 50990120219. The reversal of 50990120217 is 71202109905.

50990120217 is a `hidden beast` number, since 509 + 9 + 0 + 120 + 21 + 7 = 666.

It is not a de Polignac number, because 50990120217 - 2² = 50990120213 is a prime.

It is a super-2 number, since 2×50990120217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50990120213) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 374242 + ... + 491972.

Almost surely, 2^50990120217 is an apocalyptic number.

It is an amenable number.

50990120217 is a deficient number, since it is larger than the sum of its proper divisors (25195198839).

50990120217 is a wasteful number, since it uses less digits than its factorization.

50990120217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123090 (or 123081 counting only the distinct ones).

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

The spelling of 50990120217 in words is "fifty billion, nine hundred ninety million, one hundred twenty thousand, two hundred seventeen".