720218825 has 12 divisors (see below), whose sum is σ = 913841808. Its totient is φ = 562774800.

The previous prime is 720218813. The next prime is 720218839. The reversal of 720218825 is 528812027.

It is not a de Polignac number, because 720218825 - 2⁴ = 720218809 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 333911 + ... + 336060.

It is an arithmetic number, because the mean of its divisors is an integer number (76153484).

Almost surely, 2^720218825 is an apocalyptic number.

It is an amenable number.

720218825 is a deficient number, since it is larger than the sum of its proper divisors (193622983).

720218825 is a wasteful number, since it uses less digits than its factorization.

720218825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670024 (or 670019 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 720218825 is about 26836.8929833541. The cubic root of 720218825 is about 896.3717404284.

The spelling of 720218825 in words is "seven hundred twenty million, two hundred eighteen thousand, eight hundred twenty-five".