1331355331 has 2 divisors, whose sum is σ = 1331355332. Its totient is φ = 1331355330.

The previous prime is 1331355307. The next prime is 1331355343. The reversal of 1331355331 is 1335531331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331355331 - 2¹³ = 1331347139 is a prime.

It is a super-2 number, since 2×1331355331² = 3545014034764239122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331355331.

It is not a weakly prime, because it can be changed into another prime (1331355371) 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, 665677665 + 665677666.

It is an arithmetic number, because the mean of its divisors is an integer number (665677666).

Almost surely, 2^1331355331 is an apocalyptic number.

1331355331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331355331 is an equidigital number, since it uses as much as digits as its factorization.

1331355331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6075, while the sum is 28.

The square root of 1331355331 is about 36487.7422020053. The cubic root of 1331355331 is about 1100.0978786183.

Adding to 1331355331 its reverse (1335531331), we get a palindrome (2666886662).

It can be divided in two parts, 13313 and 55331, that added together give a square (68644 = 262²).

The spelling of 1331355331 in words is "one billion, three hundred thirty-one million, three hundred fifty-five thousand, three hundred thirty-one".