9951225 has 24 divisors (see below), whose sum is σ = 16546560. Its totient is φ = 5277120.

The previous prime is 9951211. The next prime is 9951229. The reversal of 9951225 is 5221599.

9951225 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9951225 - 2⁹ = 9950713 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9951229) 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 23 ways as a sum of consecutive naturals, for example, 20536 + ... + 21014.

It is an arithmetic number, because the mean of its divisors is an integer number (689440).

Almost surely, 2^9951225 is an apocalyptic number.

It is an amenable number.

9951225 is a deficient number, since it is larger than the sum of its proper divisors (6595335).

9951225 is a wasteful number, since it uses less digits than its factorization.

9951225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 764 counting only the distinct ones).

The product of its digits is 8100, while the sum is 33.

The square root of 9951225 is about 3154.5562286953. The cubic root of 9951225 is about 215.0926227926.

The spelling of 9951225 in words is "nine million, nine hundred fifty-one thousand, two hundred twenty-five".