2553551220 has 192 divisors, whose sum is σ = 8119222272. Its totient is φ = 594048000.

The previous prime is 2553551213. The next prime is 2553551279. The reversal of 2553551220 is 221553552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2802565 + ... + 2803475.

It is an arithmetic number, because the mean of its divisors is an integer number (42287616).

Almost surely, 2^2553551220 is an apocalyptic number.

2553551220 is a gapful number since it is divisible by the number (20) 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 2553551220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4059611136).

2553551220 is an abundant number, since it is smaller than the sum of its proper divisors (5565671052).

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

2553551220 is a wasteful number, since it uses less digits than its factorization.

2553551220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 2553551220 is about 50532.6747758319. The cubic root of 2553551220 is about 1366.8311186863.

The spelling of 2553551220 in words is "two billion, five hundred fifty-three million, five hundred fifty-one thousand, two hundred twenty".