331403265 has 32 divisors (see below), whose sum is σ = 605093760. Its totient is φ = 171968832.

The previous prime is 331403243. The next prime is 331403269. The reversal of 331403265 is 562304133.

It is a happy number.

331403265 is a `hidden beast` number, since 331 + 4 + 0 + 326 + 5 = 666.

It is not a de Polignac number, because 331403265 - 2¹⁰ = 331402241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (331403269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28179 + ... + 38168.

It is an arithmetic number, because the mean of its divisors is an integer number (18909180).

Almost surely, 2^331403265 is an apocalyptic number.

It is an amenable number.

331403265 is a deficient number, since it is larger than the sum of its proper divisors (273690495).

331403265 is a wasteful number, since it uses less digits than its factorization.

331403265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66398 (or 66392 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 331403265 is about 18204.4847496434. The cubic root of 331403265 is about 692.0204484864.

Adding to 331403265 its reverse (562304133), we get a palindrome (893707398).

The spelling of 331403265 in words is "three hundred thirty-one million, four hundred three thousand, two hundred sixty-five".