725253217 has 8 divisors (see below), whose sum is σ = 793846760. Its totient is φ = 658488960.

The previous prime is 725253197. The next prime is 725253233. The reversal of 725253217 is 712352527.

It can be written as a sum of positive squares in 4 ways, for example, as 6155361 + 719097856 = 2481^2 + 26816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725253217 - 2¹⁵ = 725220449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725251217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456492 + ... + 458077.

It is an arithmetic number, because the mean of its divisors is an integer number (99230845).

Almost surely, 2^725253217 is an apocalyptic number.

It is an amenable number.

725253217 is a deficient number, since it is larger than the sum of its proper divisors (68593543).

725253217 is a wasteful number, since it uses less digits than its factorization.

725253217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914643.

The product of its digits is 29400, while the sum is 34.

The square root of 725253217 is about 26930.5257468175. The cubic root of 725253217 is about 898.4554648538.

The spelling of 725253217 in words is "seven hundred twenty-five million, two hundred fifty-three thousand, two hundred seventeen".