1331553412 has 12 divisors (see below), whose sum is σ = 2663106880. Its totient is φ = 570665736.

The previous prime is 1331553403. The next prime is 1331553413. The reversal of 1331553412 is 2143551331.

It is a happy number.

1331553412 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 47555479 = 1331553412 / (1 + 3 + 3 + 1 + 5 + 5 + 3 + 4 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (1331553413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23777712 + ... + 23777767.

Almost surely, 2^1331553412 is an apocalyptic number.

It is an amenable number.

1331553412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331553412 is a wasteful number, since it uses less digits than its factorization.

1331553412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47555490 (or 47555488 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 1331553412 is about 36490.4564509681. The cubic root of 1331553412 is about 1100.1524339717.

The spelling of 1331553412 in words is "one billion, three hundred thirty-one million, five hundred fifty-three thousand, four hundred twelve".