725271215 has 4 divisors (see below), whose sum is σ = 870325464. Its totient is φ = 580216968.

The previous prime is 725271191. The next prime is 725271233. The reversal of 725271215 is 512172527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725271215 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 72527117 + ... + 72527126.

It is an arithmetic number, because the mean of its divisors is an integer number (217581366).

Almost surely, 2^725271215 is an apocalyptic number.

725271215 is a deficient number, since it is larger than the sum of its proper divisors (145054249).

725271215 is a wasteful number, since it uses less digits than its factorization.

725271215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145054248.

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

The square root of 725271215 is about 26930.8599008647. The cubic root of 725271215 is about 898.4628968639.

The spelling of 725271215 in words is "seven hundred twenty-five million, two hundred seventy-one thousand, two hundred fifteen".