2555515220 has 24 divisors (see below), whose sum is σ = 5431243104. Its totient is φ = 1009889696.

The previous prime is 2555515217. The next prime is 2555515229. The reversal of 2555515220 is 225155552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555515229) 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 7 ways as a sum of consecutive naturals, for example, 768074 + ... + 771393.

It is an arithmetic number, because the mean of its divisors is an integer number (226301796).

Almost surely, 2^2555515220 is an apocalyptic number.

2555515220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555515220 is an abundant number, since it is smaller than the sum of its proper divisors (2875727884).

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

2555515220 is a wasteful number, since it uses less digits than its factorization.

2555515220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539559 (or 1539557 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 2555515220 is about 50552.1040116037. The cubic root of 2555515220 is about 1367.1814501989.

The spelling of 2555515220 in words is "two billion, five hundred fifty-five million, five hundred fifteen thousand, two hundred twenty".