725245331 has 4 divisors (see below), whose sum is σ = 726452664. Its totient is φ = 724038000.

The previous prime is 725245327. The next prime is 725245357. The reversal of 725245331 is 133542527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133542527 = 107 ⋅1248061.

It is a cyclic number.

It is not a de Polignac number, because 725245331 - 2² = 725245327 is a prime.

It is a super-2 number, since 2×725245331² = 1051961580274599122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725245321) by changing a digit.

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, 602765 + ... + 603966.

It is an arithmetic number, because the mean of its divisors is an integer number (181613166).

Almost surely, 2^725245331 is an apocalyptic number.

725245331 is a deficient number, since it is larger than the sum of its proper divisors (1207333).

725245331 is a wasteful number, since it uses less digits than its factorization.

725245331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207332.

The product of its digits is 25200, while the sum is 32.

The square root of 725245331 is about 26930.3793326422. The cubic root of 725245331 is about 898.4522084071.

Adding to 725245331 its reverse (133542527), we get a palindrome (858787858).

The spelling of 725245331 in words is "seven hundred twenty-five million, two hundred forty-five thousand, three hundred thirty-one".