50990550 has 96 divisors (see below), whose sum is σ = 138324480. Its totient is φ = 12355200.

The previous prime is 50990549. The next prime is 50990579. The reversal of 50990550 is 5509905.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153885 + ... + 154215.

It is an arithmetic number, because the mean of its divisors is an integer number (1440880).

Almost surely, 2^50990550 is an apocalyptic number.

50990550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 50990550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69162240).

50990550 is an abundant number, since it is smaller than the sum of its proper divisors (87333930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50990550 is a wasteful number, since it uses less digits than its factorization.

50990550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 10125, while the sum is 33.

The square root of 50990550 is about 7140.7667655512. The cubic root of 50990550 is about 370.8200705044.

The spelling of 50990550 in words is "fifty million, nine hundred ninety thousand, five hundred fifty".