331228445 has 8 divisors (see below), whose sum is σ = 397596600. Its totient is φ = 264901120.

The previous prime is 331228421. The next prime is 331228481. The reversal of 331228445 is 544822133.

It can be written as a sum of positive squares in 4 ways, for example, as 5317636 + 325910809 = 2306^2 + 18053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331228445 - 2²⁴ = 314451229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12065 + ... + 28425.

It is an arithmetic number, because the mean of its divisors is an integer number (49699575).

Almost surely, 2^331228445 is an apocalyptic number.

It is an amenable number.

331228445 is a deficient number, since it is larger than the sum of its proper divisors (66368155).

331228445 is a wasteful number, since it uses less digits than its factorization.

331228445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20415.

The product of its digits is 23040, while the sum is 32.

The square root of 331228445 is about 18199.6825521766. The cubic root of 331228445 is about 691.8987434958.

The spelling of 331228445 in words is "three hundred thirty-one million, two hundred twenty-eight thousand, four hundred forty-five".