725251217 has 2 divisors, whose sum is σ = 725251218. Its totient is φ = 725251216.

The previous prime is 725251213. The next prime is 725251237. The reversal of 725251217 is 712152527.

725251217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620209216 + 105042001 = 24904^2 + 10249^2 .

It is a cyclic number.

It is not a de Polignac number, because 725251217 - 2² = 725251213 is a prime.

It is not a weakly prime, because it can be changed into another prime (725251213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362625608 + 362625609.

It is an arithmetic number, because the mean of its divisors is an integer number (362625609).

Almost surely, 2^725251217 is an apocalyptic number.

It is an amenable number.

725251217 is a deficient number, since it is larger than the sum of its proper divisors (1).

725251217 is an equidigital number, since it uses as much as digits as its factorization.

725251217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9800, while the sum is 32.

The square root of 725251217 is about 26930.4886142082. The cubic root of 725251217 is about 898.4546389756.

The spelling of 725251217 in words is "seven hundred twenty-five million, two hundred fifty-one thousand, two hundred seventeen".