1222521553 has 16 divisors (see below), whose sum is σ = 1393315200. Its totient is φ = 1061786880.

The previous prime is 1222521499. The next prime is 1222521563. The reversal of 1222521553 is 3551252221.

It is a de Polignac number, because none of the positive numbers 2^k-1222521553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222521563) 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, 252883 + ... + 257671.

It is an arithmetic number, because the mean of its divisors is an integer number (87082200).

Almost surely, 2^1222521553 is an apocalyptic number.

It is an amenable number.

1222521553 is a deficient number, since it is larger than the sum of its proper divisors (170793647).

1222521553 is a wasteful number, since it uses less digits than its factorization.

1222521553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832.

The product of its digits is 6000, while the sum is 28.

The square root of 1222521553 is about 34964.5756874011. The cubic root of 1222521553 is about 1069.2653859420.

Adding to 1222521553 its reverse (3551252221), we get a palindrome (4773773774).

The spelling of 1222521553 in words is "one billion, two hundred twenty-two million, five hundred twenty-one thousand, five hundred fifty-three".