731272971025 has 9 divisors (see below), whose sum is σ = 906783786001. Its totient is φ = 585014956240.

The previous prime is 731272971017. The next prime is 731272971059. The reversal of 731272971025 is 520179272137.

The square root of 731272971025 is 855145.

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 29940419089 + 701332551936 = 173033^2 + 837456^2 .

It is not a de Polignac number, because 731272971025 - 2³ = 731272971017 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 (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4190211 + ... + 4361239.

Almost surely, 2^731272971025 is an apocalyptic number.

731272971025 is the 855145-th square number.

731272971025 is the 427573-rd centered octagonal number.

It is an amenable number.

731272971025 is a deficient number, since it is larger than the sum of its proper divisors (175510814976).

731272971025 is an frugal number, since it uses more digits than its factorization.

731272971025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342068 (or 171034 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The spelling of 731272971025 in words is "seven hundred thirty-one billion, two hundred seventy-two million, nine hundred seventy-one thousand, twenty-five".