7218283225 has 6 divisors (see below), whose sum is σ = 8950671230. Its totient is φ = 5774626560.

The previous prime is 7218283213. The next prime is 7218283253. The reversal of 7218283225 is 5223828127.

It can be written as a sum of positive squares in 3 ways, for example, as 369562176 + 6848721049 = 19224^2 + 82757^2 .

It is not a de Polignac number, because 7218283225 - 2¹¹ = 7218281177 is a prime.

It is a super-2 number, since 2×7218283225² (a number of 21 digits) contains 22 as substring.

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, 144365640 + ... + 144365689.

Almost surely, 2^7218283225 is an apocalyptic number.

It is an amenable number.

7218283225 is a deficient number, since it is larger than the sum of its proper divisors (1732388005).

7218283225 is a wasteful number, since it uses less digits than its factorization.

7218283225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288731339 (or 288731334 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 7218283225 is about 84960.4803717587. The cubic root of 7218283225 is about 1932.6118561575.

The spelling of 7218283225 in words is "seven billion, two hundred eighteen million, two hundred eighty-three thousand, two hundred twenty-five".