221282622945 has 24 divisors (see below), whose sum is σ = 392911587432. Its totient is φ = 115138924800.

The previous prime is 221282622919. The next prime is 221282622983. The reversal of 221282622945 is 549226282122.

221282622945 is a `hidden beast` number, since 2 + 2 + 12 + 8 + 2 + 622 + 9 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 22857811344 + 198424811601 = 151188^2 + 445449^2 .

It is not a de Polignac number, because 221282622945 - 2¹⁰ = 221282621921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 221282622945.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59966346 + ... + 59970035.

It is an arithmetic number, because the mean of its divisors is an integer number (16371316143).

Almost surely, 2^221282622945 is an apocalyptic number.

It is an amenable number.

221282622945 is a deficient number, since it is larger than the sum of its proper divisors (171628964487).

221282622945 is a wasteful number, since it uses less digits than its factorization.

221282622945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119936433 (or 119936430 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 221282622945 in words is "two hundred twenty-one billion, two hundred eighty-two million, six hundred twenty-two thousand, nine hundred forty-five".