221105550245 has 8 divisors (see below), whose sum is σ = 265348075416. Its totient is φ = 176870163456.

The previous prime is 221105550221. The next prime is 221105550257. The reversal of 221105550245 is 542055501122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 535367044 + 220570183201 = 23138^2 + 469649^2 .

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 221105550245 - 2¹⁸ = 221105288101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1716212 + ... + 1840541.

It is an arithmetic number, because the mean of its divisors is an integer number (33168509427).

Almost surely, 2^221105550245 is an apocalyptic number.

It is an amenable number.

221105550245 is a deficient number, since it is larger than the sum of its proper divisors (44242525171).

221105550245 is a wasteful number, since it uses less digits than its factorization.

221105550245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569191.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 221105550245 in words is "two hundred twenty-one billion, one hundred five million, five hundred fifty thousand, two hundred forty-five".