522678391225 has 9 divisors (see below), whose sum is σ = 648125687533. Its totient is φ = 418139821120.

The previous prime is 522678391219. The next prime is 522678391271. The reversal of 522678391225 is 522193876225.

The square root of 522678391225 is 722965.

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

It can be written as a sum of positive squares in 4 ways, for example, as 171451480489 + 351226910736 = 414067^2 + 592644^2 .

It is not a de Polignac number, because 522678391225 - 2¹³ = 522678383033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3542529 + ... + 3687121.

Almost surely, 2^522678391225 is an apocalyptic number.

522678391225 is the 722965-th square number.

522678391225 is the 361483-rd centered octagonal number.

It is an amenable number.

522678391225 is a deficient number, since it is larger than the sum of its proper divisors (125447296308).

522678391225 is an frugal number, since it uses more digits than its factorization.

522678391225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289196 (or 144598 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 52.

The spelling of 522678391225 in words is "five hundred twenty-two billion, six hundred seventy-eight million, three hundred ninety-one thousand, two hundred twenty-five".