2216661551105 has 8 divisors (see below), whose sum is σ = 2660009275752. Its totient is φ = 1773318964608.

The previous prime is 2216661551101. The next prime is 2216661551141. The reversal of 2216661551105 is 5011551666122.

It can be written as a sum of positive squares in 4 ways, for example, as 830739279601 + 1385922271504 = 911449^2 + 1177252^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2216661551105 - 2² = 2216661551101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216661551101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261332 + ... + 2121701.

It is an arithmetic number, because the mean of its divisors is an integer number (332501159469).

Almost surely, 2^{2216661551105} is an apocalyptic number.

It is an amenable number.

2216661551105 is a deficient number, since it is larger than the sum of its proper divisors (443347724647).

2216661551105 is a wasteful number, since it uses less digits than its factorization.

2216661551105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569075.

The product of its (nonzero) digits is 108000, while the sum is 41.

It can be divided in two parts, 221666 and 1551105, that added together give a palindrome (1772771).

The spelling of 2216661551105 in words is "two trillion, two hundred sixteen billion, six hundred sixty-one million, five hundred fifty-one thousand, one hundred five".