1220554033 has 4 divisors (see below), whose sum is σ = 1220648308. Its totient is φ = 1220459760.

The previous prime is 1220553991. The next prime is 1220554037. The reversal of 1220554033 is 3304550221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3304550221 = 7 ⋅472078603.

It can be written as a sum of positive squares in 2 ways, for example, as 112529664 + 1108024369 = 10608^2 + 33287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220554033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220553989 and 1220554007.

It is not an unprimeable number, because it can be changed into a prime (1220554037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23898 + ... + 54883.

It is an arithmetic number, because the mean of its divisors is an integer number (305162077).

Almost surely, 2^1220554033 is an apocalyptic number.

It is an amenable number.

1220554033 is a deficient number, since it is larger than the sum of its proper divisors (94275).

1220554033 is an equidigital number, since it uses as much as digits as its factorization.

1220554033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94274.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1220554033 is about 34936.4284522617. The cubic root of 1220554033 is about 1068.6914545042.

The spelling of 1220554033 in words is "one billion, two hundred twenty million, five hundred fifty-four thousand, thirty-three".