722657225 has 12 divisors (see below), whose sum is σ = 896497680. Its totient is φ = 577866000.

The previous prime is 722657209. The next prime is 722657227. The reversal of 722657225 is 522756227.

It is not a de Polignac number, because 722657225 - 2⁴ = 722657209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722657227) 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 11 ways as a sum of consecutive naturals, for example, 66206 + ... + 76344.

It is an arithmetic number, because the mean of its divisors is an integer number (74708140).

Almost surely, 2^722657225 is an apocalyptic number.

It is an amenable number.

722657225 is a deficient number, since it is larger than the sum of its proper divisors (173840455).

722657225 is a wasteful number, since it uses less digits than its factorization.

722657225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13000 (or 12995 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 722657225 is about 26882.2845941337. The cubic root of 722657225 is about 897.3821975876.

The spelling of 722657225 in words is "seven hundred twenty-two million, six hundred fifty-seven thousand, two hundred twenty-five".