1220325552 has 120 divisors (see below), whose sum is σ = 3700526544. Its totient is φ = 373911552.

The previous prime is 1220325551. The next prime is 1220325553. The reversal of 1220325552 is 2555230221.

It is an interprime number because it is at equal distance from previous prime (1220325551) and next prime (1220325553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220325551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99468 + ... + 111060.

Almost surely, 2^1220325552 is an apocalyptic number.

1220325552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220325552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850263272).

1220325552 is an abundant number, since it is smaller than the sum of its proper divisors (2480200992).

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

1220325552 is a wasteful number, since it uses less digits than its factorization.

1220325552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11667 (or 11658 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1220325552 is about 34933.1583456177. The cubic root of 1220325552 is about 1068.6247659558.

Adding to 1220325552 its reverse (2555230221), we get a palindrome (3775555773).

The spelling of 1220325552 in words is "one billion, two hundred twenty million, three hundred twenty-five thousand, five hundred fifty-two".