2172492100 has 81 divisors (see below), whose sum is σ = 4857037437. Its totient is φ = 843454560.

The previous prime is 2172492073. The next prime is 2172492103. The reversal of 2172492100 is 12942712.

The square root of 2172492100 is 46610.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 782097156 + 1390394944 = 27966^2 + 37288^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172492103) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27499861 + ... + 27499939.

Almost surely, 2^2172492100 is an apocalyptic number.

2172492100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2172492100 is the 46610-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172492100

2172492100 is an abundant number, since it is smaller than the sum of its proper divisors (2684545337).

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

2172492100 is an equidigital number, since it uses as much as digits as its factorization.

2172492100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The cubic root of 2172492100 is about 1295.1480081077.

The spelling of 2172492100 in words is "two billion, one hundred seventy-two million, four hundred ninety-two thousand, one hundred".