1331225649 has 12 divisors (see below), whose sum is σ = 2070795636. Its totient is φ = 819215712.

The previous prime is 1331225617. The next prime is 1331225659. The reversal of 1331225649 is 9465221331.

1331225649 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 2 + 2 + 5 + 649 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 257025024 + 1074200625 = 16032^2 + 32775^2 .

It is not a de Polignac number, because 1331225649 - 2⁵ = 1331225617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331225659) 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, 5688882 + ... + 5689115.

It is an arithmetic number, because the mean of its divisors is an integer number (172566303).

Almost surely, 2^1331225649 is an apocalyptic number.

It is an amenable number.

1331225649 is a deficient number, since it is larger than the sum of its proper divisors (739569987).

1331225649 is a wasteful number, since it uses less digits than its factorization.

1331225649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11378016 (or 11378013 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1331225649 is about 36485.9650961846. The cubic root of 1331225649 is about 1100.0621587464.

The spelling of 1331225649 in words is "one billion, three hundred thirty-one million, two hundred twenty-five thousand, six hundred forty-nine".