1220554152 has 24 divisors (see below), whose sum is σ = 3305667690. Its totient is φ = 406851360.

The previous prime is 1220554141. The next prime is 1220554157. The reversal of 1220554152 is 2514550221.

It can be written as a sum of positive squares in only one way, i.e., 1080699876 + 139854276 = 32874^2 + 11826^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1220554157) 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 5 ways as a sum of consecutive naturals, for example, 8475999 + ... + 8476142.

Almost surely, 2^1220554152 is an apocalyptic number.

1220554152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220554152 is an abundant number, since it is smaller than the sum of its proper divisors (2085113538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220554152 is a wasteful number, since it uses less digits than its factorization.

1220554152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16952153 (or 16952146 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1220554152 is about 34936.4301553550. The cubic root of 1220554152 is about 1068.6914892355.

The spelling of 1220554152 in words is "one billion, two hundred twenty million, five hundred fifty-four thousand, one hundred fifty-two".