1331144533 has 2 divisors, whose sum is σ = 1331144534. Its totient is φ = 1331144532.

The previous prime is 1331144491. The next prime is 1331144537. The reversal of 1331144533 is 3354411331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 873911844 + 457232689 = 29562^2 + 21383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331144533 - 2¹³ = 1331136341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331144537) 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 as a sum of consecutive naturals, namely, 665572266 + 665572267.

It is an arithmetic number, because the mean of its divisors is an integer number (665572267).

Almost surely, 2^1331144533 is an apocalyptic number.

It is an amenable number.

1331144533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331144533 is an equidigital number, since it uses as much as digits as its factorization.

1331144533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 1331144533 is about 36484.8534737362. The cubic root of 1331144533 is about 1100.0398148123.

Adding to 1331144533 its reverse (3354411331), we get a palindrome (4685555864).

The spelling of 1331144533 in words is "one billion, three hundred thirty-one million, one hundred forty-four thousand, five hundred thirty-three".