1331403503 has 2 divisors, whose sum is σ = 1331403504. Its totient is φ = 1331403502.

The previous prime is 1331403443. The next prime is 1331403529. The reversal of 1331403503 is 3053041331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331403503 - 2¹⁶ = 1331337967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331403583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665701751 + 665701752.

It is an arithmetic number, because the mean of its divisors is an integer number (665701752).

Almost surely, 2^1331403503 is an apocalyptic number.

1331403503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331403503 is an equidigital number, since it uses as much as digits as its factorization.

1331403503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 1331403503 is about 36488.4023081307. The cubic root of 1331403503 is about 1100.1111466203. Note that the first 4 decimals are identical.

Adding to 1331403503 its reverse (3053041331), we get a palindrome (4384444834).

The spelling of 1331403503 in words is "one billion, three hundred thirty-one million, four hundred three thousand, five hundred three".