2101280172 has 96 divisors (see below), whose sum is σ = 5366850048. Its totient is φ = 637185024.

The previous prime is 2101280171. The next prime is 2101280177. The reversal of 2101280172 is 2710821012.

It is a super-2 number, since 2×2101280172² = 8830756722480699168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101280171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1259683 + ... + 1261349.

It is an arithmetic number, because the mean of its divisors is an integer number (55904688).

Almost surely, 2^2101280172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101280172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2683425024).

2101280172 is an abundant number, since it is smaller than the sum of its proper divisors (3265569876).

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

2101280172 is a wasteful number, since it uses less digits than its factorization.

2101280172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 2101280172 is about 45839.7226431400. The cubic root of 2101280172 is about 1280.8393282545.

The spelling of 2101280172 in words is "two billion, one hundred one million, two hundred eighty thousand, one hundred seventy-two".