220500220500055 has 32 divisors (see below), whose sum is σ = 269583808746240. Its totient is φ = 173099203200000.

The previous prime is 220500220500047. The next prime is 220500220500107. The reversal of 220500220500055 is 550005022005022.

220500220500055 is a nontrivial binomial coefficient, being equal to C(21000011, 2).

It is not a de Polignac number, because 220500220500055 - 2³ = 220500220500047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220500220499996 and 220500220500032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103950055 + ... + 106050055.

It is an arithmetic number, because the mean of its divisors is an integer number (8424494023320).

Almost surely, 2^{220500220500055} is an apocalyptic number.

220500220500055 is the 21000010-th triangular number.

220500220500055 is the 7000004-th centered nonagonal number.

220500220500055 is a deficient number, since it is larger than the sum of its proper divisors (49083588246185).

220500220500055 is a wasteful number, since it uses less digits than its factorization.

220500220500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101279.

The product of its (nonzero) digits is 10000, while the sum is 28.

Adding to 220500220500055 its reverse (550005022005022), we get a palindrome (770505242505077).

It can be divided in two parts, 220500 and 220500055, that added together give a triangular number (220720555 = T₂₁₀₁₀).

The spelling of 220500220500055 in words is "two hundred twenty trillion, five hundred billion, two hundred twenty million, five hundred thousand, fifty-five".