7287183225 has 135 divisors (see below), whose sum is σ = 15760355391. Its totient is φ = 3318991200.

The previous prime is 7287183217. The next prime is 7287183227. The reversal of 7287183225 is 5223817827.

The square root of 7287183225 is 85365.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2623385961 + 4663797264 = 51219^2 + 68292^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 7287183225 - 2³ = 7287183217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7287183227) by changing a digit.

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 134 ways as a sum of consecutive naturals, for example, 26889840 + ... + 26890110.

Almost surely, 2^7287183225 is an apocalyptic number.

7287183225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7287183225 is the 85365-th square number.

7287183225 is the 42683-rd centered octagonal number.

It is an amenable number.

7287183225 is an abundant number, since it is smaller than the sum of its proper divisors (8473172166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7287183225 is an equidigital number, since it uses as much as digits as its factorization.

7287183225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 286 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The cubic root of 7287183225 is about 1938.7414539690.

The spelling of 7287183225 in words is "seven billion, two hundred eighty-seven million, one hundred eighty-three thousand, two hundred twenty-five".