321253225 has 24 divisors (see below), whose sum is σ = 411009408. Its totient is φ = 248952000.

The previous prime is 321253223. The next prime is 321253249. The reversal of 321253225 is 522352123.

It is not a de Polignac number, because 321253225 - 2¹ = 321253223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321253225.

It is not an unprimeable number, because it can be changed into a prime (321253223) 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, 117322 + ... + 120028.

It is an arithmetic number, because the mean of its divisors is an integer number (17125392).

Almost surely, 2^321253225 is an apocalyptic number.

It is an amenable number.

321253225 is a deficient number, since it is larger than the sum of its proper divisors (89756183).

321253225 is a wasteful number, since it uses less digits than its factorization.

321253225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865 (or 2860 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 321253225 is about 17923.5382946560. The cubic root of 321253225 is about 684.8821258094.

The spelling of 321253225 in words is "three hundred twenty-one million, two hundred fifty-three thousand, two hundred twenty-five".