331403425 has 6 divisors (see below), whose sum is σ = 410940278. Its totient is φ = 265122720.

The previous prime is 331403419. The next prime is 331403437. The reversal of 331403425 is 524304133.

It can be written as a sum of positive squares in 3 ways, for example, as 42981136 + 288422289 = 6556^2 + 16983^2 .

It is not a de Polignac number, because 331403425 - 2¹⁹ = 330879137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 13256137 = 331403425 / (3 + 3 + 1 + 4 + 0 + 3 + 4 + 2 + 5).

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 331403425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6628044 + ... + 6628093.

Almost surely, 2^331403425 is an apocalyptic number.

It is an amenable number.

331403425 is a deficient number, since it is larger than the sum of its proper divisors (79536853).

331403425 is a wasteful number, since it uses less digits than its factorization.

331403425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13256147 (or 13256142 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 331403425 is about 18204.4891441644. The cubic root of 331403425 is about 692.0205598545.

Adding to 331403425 its reverse (524304133), we get a palindrome (855707558).

The spelling of 331403425 in words is "three hundred thirty-one million, four hundred three thousand, four hundred twenty-five".