581031220050 has 54 divisors (see below), whose sum is σ = 1561080655407. Its totient is φ = 154937346720.

The previous prime is 581031220043. The next prime is 581031220087. The reversal of 581031220050 is 50022130185.

It is a happy number.

581031220050 is a `hidden beast` number, since 581 + 0 + 3 + 12 + 20 + 0 + 50 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 334938830121 + 246092389929 = 578739^2 + 496077^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=538995.

It is a junction number, because it is equal to n+sod(n) for n = 581031219996 and 581031220023.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16151884 + ... + 16187816.

Almost surely, 2^581031220050 is an apocalyptic number.

581031220050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

581031220050 is an abundant number, since it is smaller than the sum of its proper divisors (980049435357).

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

581031220050 is an frugal number, since it uses more digits than its factorization.

581031220050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71884 (or 35943 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 581031220050 in words is "five hundred eighty-one billion, thirty-one million, two hundred twenty thousand, fifty".