2505745220 has 48 divisors (see below), whose sum is σ = 5750414208. Its totient is φ = 909596160.

The previous prime is 2505745219. The next prime is 2505745223. The reversal of 2505745220 is 225475052.

It is not an unprimeable number, because it can be changed into a prime (2505745223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120857 + ... + 140063.

It is an arithmetic number, because the mean of its divisors is an integer number (119800296).

Almost surely, 2^2505745220 is an apocalyptic number.

2505745220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2505745220 is an abundant number, since it is smaller than the sum of its proper divisors (3244668988).

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

2505745220 is a wasteful number, since it uses less digits than its factorization.

2505745220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19820 (or 19818 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 2505745220 is about 50057.4192303199. The cubic root of 2505745220 is about 1358.2476746599.

The spelling of 2505745220 in words is "two billion, five hundred five million, seven hundred forty-five thousand, two hundred twenty".