2500405220 has 24 divisors (see below), whose sum is σ = 5559725304. Its totient is φ = 941328896.

The previous prime is 2500405177. The next prime is 2500405247. The reversal of 2500405220 is 225040052.

It can be written as a sum of positive squares in 4 ways, for example, as 577056484 + 1923348736 = 24022^2 + 43856^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2500405192 and 2500405201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3676727 + ... + 3677406.

It is an arithmetic number, because the mean of its divisors is an integer number (231655221).

Almost surely, 2^2500405220 is an apocalyptic number.

2500405220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2500405220 is an abundant number, since it is smaller than the sum of its proper divisors (3059320084).

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

2500405220 is a wasteful number, since it uses less digits than its factorization.

2500405220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7354159 (or 7354157 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2500405220 is about 50004.0520358101. The cubic root of 2500405220 is about 1357.2821334230.

Adding to 2500405220 its reverse (225040052), we get a palindrome (2725445272).

The spelling of 2500405220 in words is "two billion, five hundred million, four hundred five thousand, two hundred twenty".