2656530225 has 72 divisors (see below), whose sum is σ = 4853709432. Its totient is φ = 1388620800.

The previous prime is 2656530197. The next prime is 2656530241. The reversal of 2656530225 is 5220356562.

It can be written as a sum of positive squares in 12 ways, for example, as 227617569 + 2428912656 = 15087^2 + 49284^2 .

It is not a de Polignac number, because 2656530225 - 2⁹ = 2656529713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656530225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3235315 + ... + 3236135.

It is an arithmetic number, because the mean of its divisors is an integer number (67412631).

Almost surely, 2^2656530225 is an apocalyptic number.

2656530225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2656530225 is a deficient number, since it is larger than the sum of its proper divisors (2197179207).

2656530225 is a wasteful number, since it uses less digits than its factorization.

2656530225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 2656530225 is about 51541.5388303454. The cubic root of 2656530225 is about 1384.9632636756.

Adding to 2656530225 its reverse (5220356562), we get a palindrome (7876886787).

The spelling of 2656530225 in words is "two billion, six hundred fifty-six million, five hundred thirty thousand, two hundred twenty-five".