1222544005 has 16 divisors (see below), whose sum is σ = 1494801648. Its totient is φ = 959616000.

The previous prime is 1222544003. The next prime is 1222544021. The reversal of 1222544005 is 5004452221.

It can be written as a sum of positive squares in 8 ways, for example, as 581340321 + 641203684 = 24111^2 + 25322^2 .

It is not a de Polignac number, because 1222544005 - 2¹ = 1222544003 is a prime.

It is a super-2 number, since 2×1222544005² = 2989227688322880050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222544003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123645 + ... + 133165.

It is an arithmetic number, because the mean of its divisors is an integer number (93425103).

Almost surely, 2^1222544005 is an apocalyptic number.

It is an amenable number.

1222544005 is a deficient number, since it is larger than the sum of its proper divisors (272257643).

1222544005 is an equidigital number, since it uses as much as digits as its factorization.

1222544005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1222544005 is about 34964.8967537443. The cubic root of 1222544005 is about 1069.2719317024.

Adding to 1222544005 its reverse (5004452221), we get a palindrome (6226996226).

The spelling of 1222544005 in words is "one billion, two hundred twenty-two million, five hundred forty-four thousand, five".