216550240100 has 18 divisors (see below), whose sum is σ = 469914021234. Its totient is φ = 86620096000.

The previous prime is 216550240091. The next prime is 216550240129. The reversal of 216550240100 is 1042055612.

It can be written as a sum of positive squares in 3 ways, for example, as 1185562624 + 215364677476 = 34432^2 + 464074^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216550240100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1082751101 + ... + 1082751300.

It is an arithmetic number, because the mean of its divisors is an integer number (26106334513).

Almost surely, 2^216550240100 is an apocalyptic number.

216550240100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216550240100 is an abundant number, since it is smaller than the sum of its proper divisors (253363781134).

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

216550240100 is a wasteful number, since it uses less digits than its factorization.

216550240100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165502415 (or 2165502408 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 216550240100 its reverse (1042055612), we get a palindrome (217592295712).

The spelling of 216550240100 in words is "two hundred sixteen billion, five hundred fifty million, two hundred forty thousand, one hundred".