2523405220 has 48 divisors (see below), whose sum is σ = 6158839680. Its totient is φ = 850500864.

The previous prime is 2523405197. The next prime is 2523405221. The reversal of 2523405220 is 225043252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2523405221) 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, 144489 + ... + 161008.

It is an arithmetic number, because the mean of its divisors is an integer number (128309160).

Almost surely, 2^2523405220 is an apocalyptic number.

2523405220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2523405220 is an abundant number, since it is smaller than the sum of its proper divisors (3635434460).

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

2523405220 is a wasteful number, since it uses less digits than its factorization.

2523405220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305572 (or 305570 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 2523405220 is about 50233.5069450661. The cubic root of 2523405220 is about 1361.4310952084.

Adding to 2523405220 its reverse (225043252), we get a palindrome (2748448472).

The spelling of 2523405220 in words is "two billion, five hundred twenty-three million, four hundred five thousand, two hundred twenty".