731313664225 has 12 divisors (see below), whose sum is σ = 907006876540. Its totient is φ = 584936136000.

The previous prime is 731313664217. The next prime is 731313664261. The reversal of 731313664225 is 522466313137.

It can be written as a sum of positive squares in 6 ways, for example, as 427967172864 + 303346491361 = 654192^2 + 550769^2 .

It is not a de Polignac number, because 731313664225 - 2³ = 731313664217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2739810 + ... + 2994859.

Almost surely, 2^731313664225 is an apocalyptic number.

It is an amenable number.

731313664225 is a deficient number, since it is larger than the sum of its proper divisors (175693212315).

731313664225 is a wasteful number, since it uses less digits than its factorization.

731313664225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739780 (or 5739775 counting only the distinct ones).

The product of its digits is 544320, while the sum is 43.

The spelling of 731313664225 in words is "seven hundred thirty-one billion, three hundred thirteen million, six hundred sixty-four thousand, two hundred twenty-five".