50172021900 has 432 divisors, whose sum is σ = 211151985408. Its totient is φ = 9623232000.

The previous prime is 50172021863. The next prime is 50172021917. The reversal of 50172021900 is 912027105.

50172021900 is a `hidden beast` number, since 501 + 72 + 0 + 2 + 1 + 90 + 0 = 666.

It is a super-2 number, since 2×50172021900² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 873055 + ... + 928745.

It is an arithmetic number, because the mean of its divisors is an integer number (488777744).

Almost surely, 2^50172021900 is an apocalyptic number.

50172021900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50172021900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105575992704).

50172021900 is an abundant number, since it is smaller than the sum of its proper divisors (160979963508).

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

50172021900 is a wasteful number, since it uses less digits than its factorization.

50172021900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55742 (or 55732 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The spelling of 50172021900 in words is "fifty billion, one hundred seventy-two million, twenty-one thousand, nine hundred".