331221325 has 24 divisors (see below), whose sum is σ = 430329600. Its totient is φ = 252557760.

The previous prime is 331221307. The next prime is 331221337. The reversal of 331221325 is 523122133.

It is not a de Polignac number, because 331221325 - 2⁷ = 331221197 is a prime.

It is a super-2 number, since 2×331221325² = 219415132269511250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331221296 and 331221305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54384 + ... + 60166.

It is an arithmetic number, because the mean of its divisors is an integer number (17930400).

Almost surely, 2^331221325 is an apocalyptic number.

It is an amenable number.

331221325 is a deficient number, since it is larger than the sum of its proper divisors (99108275).

331221325 is a wasteful number, since it uses less digits than its factorization.

331221325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901 (or 5896 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 331221325 is about 18199.4869433179. The cubic root of 331221325 is about 691.8937858354.

Adding to 331221325 its reverse (523122133), we get a palindrome (854343458).

The spelling of 331221325 in words is "three hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-five".