2171203225 has 24 divisors (see below), whose sum is σ = 2730575232. Its totient is φ = 1712356800.

The previous prime is 2171203189. The next prime is 2171203249. The reversal of 2171203225 is 5223021712.

2171203225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2171203225 - 2²³ = 2162814617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2171203225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1370784 + ... + 1372366.

It is an arithmetic number, because the mean of its divisors is an integer number (113773968).

Almost surely, 2^2171203225 is an apocalyptic number.

2171203225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2171203225 is a deficient number, since it is larger than the sum of its proper divisors (559372007).

2171203225 is a wasteful number, since it uses less digits than its factorization.

2171203225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2171203225 is about 46596.1717848151. The cubic root of 2171203225 is about 1294.8918331662.

Adding to 2171203225 its reverse (5223021712), we get a palindrome (7394224937).

The spelling of 2171203225 in words is "two billion, one hundred seventy-one million, two hundred three thousand, two hundred twenty-five".