1228585533 has 16 divisors (see below), whose sum is σ = 1872627840. Its totient is φ = 701862336.

The previous prime is 1228585511. The next prime is 1228585559. The reversal of 1228585533 is 3355858221.

It is a happy number.

It is not a de Polignac number, because 1228585533 - 2⁶ = 1228585469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228583533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129591 + ... + 138747.

It is an arithmetic number, because the mean of its divisors is an integer number (117039240).

Almost surely, 2^1228585533 is an apocalyptic number.

It is an amenable number.

1228585533 is a deficient number, since it is larger than the sum of its proper divisors (644042307).

1228585533 is an equidigital number, since it uses as much as digits as its factorization.

1228585533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556.

The product of its digits is 288000, while the sum is 42.

The square root of 1228585533 is about 35051.1844735667. The cubic root of 1228585533 is about 1071.0304025837.

The spelling of 1228585533 in words is "one billion, two hundred twenty-eight million, five hundred eighty-five thousand, five hundred thirty-three".