2918197225 has 12 divisors (see below), whose sum is σ = 3686841036. Its totient is φ = 2290508480.

The previous prime is 2918197223. The next prime is 2918197229. The reversal of 2918197225 is 5227918192.

It can be written as a sum of positive squares in 6 ways, for example, as 74321641 + 2843875584 = 8621^2 + 53328^2 .

It is not a de Polignac number, because 2918197225 - 2¹ = 2918197223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2918197223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099882 + ... + 1102531.

It is an arithmetic number, because the mean of its divisors is an integer number (307236753).

Almost surely, 2^2918197225 is an apocalyptic number.

2918197225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2918197225 is a deficient number, since it is larger than the sum of its proper divisors (768643811).

2918197225 is a wasteful number, since it uses less digits than its factorization.

2918197225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202476 (or 2202471 counting only the distinct ones).

The product of its digits is 181440, while the sum is 46.

The square root of 2918197225 is about 54020.3408449077. The cubic root of 2918197225 is about 1429.0196917916.

The spelling of 2918197225 in words is "two billion, nine hundred eighteen million, one hundred ninety-seven thousand, two hundred twenty-five".