331321625 has 8 divisors (see below), whose sum is σ = 413489544. Its totient is φ = 265057200.

The previous prime is 331321621. The next prime is 331321631. The reversal of 331321625 is 526123133.

It can be written as a sum of positive squares in 4 ways, for example, as 45981961 + 285339664 = 6781^2 + 16892^2 .

It is not a de Polignac number, because 331321625 - 2² = 331321621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331321594 and 331321603.

It is not an unprimeable number, because it can be changed into a prime (331321621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325162 + ... + 1325411.

It is an arithmetic number, because the mean of its divisors is an integer number (51686193).

Almost surely, 2^331321625 is an apocalyptic number.

It is an amenable number.

331321625 is a deficient number, since it is larger than the sum of its proper divisors (82167919).

331321625 is an equidigital number, since it uses as much as digits as its factorization.

331321625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650588 (or 2650578 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 331321625 is about 18202.2423069247. The cubic root of 331321625 is about 691.9636182383.

Adding to 331321625 its reverse (526123133), we get a palindrome (857444758).

The spelling of 331321625 in words is "three hundred thirty-one million, three hundred twenty-one thousand, six hundred twenty-five".