1331404225 has 12 divisors (see below), whose sum is σ = 1652055100. Its totient is φ = 1064404800.

The previous prime is 1331404199. The next prime is 1331404229. The reversal of 1331404225 is 5224041331.

It can be written as a sum of positive squares in 6 ways, for example, as 262310416 + 1069093809 = 16196^2 + 32697^2 .

It is not a de Polignac number, because 1331404225 - 2⁹ = 1331403713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1331404225.

It is not an unprimeable number, because it can be changed into a prime (1331404229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21535 + ... + 55915.

Almost surely, 2^1331404225 is an apocalyptic number.

It is an amenable number.

1331404225 is a deficient number, since it is larger than the sum of its proper divisors (320650875).

1331404225 is a wasteful number, since it uses less digits than its factorization.

1331404225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35940 (or 35935 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1331404225 is about 36488.4122016840. The cubic root of 1331404225 is about 1100.1113454782. Note that the first 3 decimals are identical.

Adding to 1331404225 its reverse (5224041331), we get a palindrome (6555445556).

The spelling of 1331404225 in words is "one billion, three hundred thirty-one million, four hundred four thousand, two hundred twenty-five".