2163522500 has 30 divisors (see below), whose sum is σ = 4731196470. Its totient is φ = 865408000.

The previous prime is 2163522479. The next prime is 2163522547. The reversal of 2163522500 is 52253612.

It can be written as a sum of positive squares in 5 ways, for example, as 259596544 + 1903925956 = 16112^2 + 43634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2163522500.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 430205 + ... + 435204.

It is an arithmetic number, because the mean of its divisors is an integer number (157706549).

Almost surely, 2^2163522500 is an apocalyptic number.

2163522500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2163522500 is an abundant number, since it is smaller than the sum of its proper divisors (2567673970).

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

2163522500 is an equidigital number, since it uses as much as digits as its factorization.

2163522500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865433 (or 865416 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2163522500 is about 46513.6807831846. The cubic root of 2163522500 is about 1293.3631172213.

The spelling of 2163522500 in words is "two billion, one hundred sixty-three million, five hundred twenty-two thousand, five hundred".