2221009545 has 32 divisors (see below), whose sum is σ = 3663088128. Its totient is φ = 1148283648.

The previous prime is 2221009543. The next prime is 2221009561. The reversal of 2221009545 is 5459001222.

It is not a de Polignac number, because 2221009545 - 2¹ = 2221009543 is a prime.

It is a super-2 number, since 2×2221009545² = 9865766797962214050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221009543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146512 + ... + 160958.

It is an arithmetic number, because the mean of its divisors is an integer number (114471504).

Almost surely, 2^2221009545 is an apocalyptic number.

It is an amenable number.

2221009545 is a deficient number, since it is larger than the sum of its proper divisors (1442078583).

2221009545 is a wasteful number, since it uses less digits than its factorization.

2221009545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14769.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2221009545 is about 47127.5879395498. The cubic root of 2221009545 is about 1304.7184636571.

The spelling of 2221009545 in words is "two billion, two hundred twenty-one million, nine thousand, five hundred forty-five".