1331232225 has 24 divisors (see below), whose sum is σ = 2271973632. Its totient is φ = 687086400.

The previous prime is 1331232197. The next prime is 1331232229. The reversal of 1331232225 is 5222321331.

It is a happy number.

It is not a de Polignac number, because 1331232225 - 2¹¹ = 1331230177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331232195 and 1331232204.

It is not an unprimeable number, because it can be changed into a prime (1331232229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283962 + ... + 288611.

It is an arithmetic number, because the mean of its divisors is an integer number (94665568).

Almost surely, 2^1331232225 is an apocalyptic number.

1331232225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331232225 is a deficient number, since it is larger than the sum of its proper divisors (940741407).

1331232225 is a wasteful number, since it uses less digits than its factorization.

1331232225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572617 (or 572612 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 1331232225 is about 36486.0552129166. The cubic root of 1331232225 is about 1100.0639701090.

Adding to 1331232225 its reverse (5222321331), we get a palindrome (6553553556).

The spelling of 1331232225 in words is "one billion, three hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-five".