43457656225 has 27 divisors (see below), whose sum is σ = 54426615339. Its totient is φ = 34421740800.

The previous prime is 43457656217. The next prime is 43457656241. The reversal of 43457656225 is 52265675434.

The square root of 43457656225 is 208465.

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

It can be written as a sum of positive squares in 13 ways, for example, as 1439215969 + 42018440256 = 37937^2 + 204984^2 .

It is not a de Polignac number, because 43457656225 - 2³ = 43457656217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 180322105 + ... + 180322345.

Almost surely, 2^43457656225 is an apocalyptic number.

43457656225 is the 208465-th square number.

43457656225 is the 104233-rd centered octagonal number.

It is an amenable number.

43457656225 is a deficient number, since it is larger than the sum of its proper divisors (10968959114).

43457656225 is an frugal number, since it uses more digits than its factorization.

43457656225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 419 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 49.

Multiplying 43457656225 by its sum of digits (49), we get a square (2129425155025 = 1459255²).

The spelling of 43457656225 in words is "forty-three billion, four hundred fifty-seven million, six hundred fifty-six thousand, two hundred twenty-five".