2170885225 has 6 divisors (see below), whose sum is σ = 2691897710. Its totient is φ = 1736708160.

The previous prime is 2170885187. The next prime is 2170885243. The reversal of 2170885225 is 5225880712.

It can be written as a sum of positive squares in 3 ways, for example, as 452285289 + 1718599936 = 21267^2 + 41456^2 .

It is not a de Polignac number, because 2170885225 - 2¹⁵ = 2170852457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43417680 + ... + 43417729.

Almost surely, 2^2170885225 is an apocalyptic number.

2170885225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2170885225 is a deficient number, since it is larger than the sum of its proper divisors (521012485).

2170885225 is an equidigital number, since it uses as much as digits as its factorization.

2170885225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86835419 (or 86835414 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 2170885225 is about 46592.7593623730. The cubic root of 2170885225 is about 1294.8286123519.

The spelling of 2170885225 in words is "two billion, one hundred seventy million, eight hundred eighty-five thousand, two hundred twenty-five".