205215440050000 has 60 divisors (see below), whose sum is σ = 496974335598972. Its totient is φ = 82086176000000.

The previous prime is 205215440049967. The next prime is 205215440050013. The reversal of 205215440050000 is 50044512502.

It can be written as a sum of positive squares in 6 ways, for example, as 171092364531984 + 34123075518016 = 13080228^2 + 5841496^2 .

It is a super-2 number, since 2×205215440050000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2052104401 + ... + 2052204400.

Almost surely, 2^{205215440050000} is an apocalyptic number.

205215440050000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205215440050000 is an abundant number, since it is smaller than the sum of its proper divisors (291758895548972).

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

205215440050000 is an frugal number, since it uses more digits than its factorization.

205215440050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104308834 (or 4104308808 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 205215440050000 its reverse (50044512502), we get a palindrome (205265484562502).

The spelling of 205215440050000 in words is "two hundred five trillion, two hundred fifteen billion, four hundred forty million, fifty thousand".