1331133455 has 4 divisors (see below), whose sum is σ = 1597360152. Its totient is φ = 1064906760.

The previous prime is 1331133431. The next prime is 1331133491. The reversal of 1331133455 is 5543311331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5543311331 = 43 ⋅128914217.

It is a de Polignac number, because none of the positive numbers 2^k-1331133455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 133113341 + ... + 133113350.

It is an arithmetic number, because the mean of its divisors is an integer number (399340038).

Almost surely, 2^1331133455 is an apocalyptic number.

1331133455 is a deficient number, since it is larger than the sum of its proper divisors (266226697).

1331133455 is an equidigital number, since it uses as much as digits as its factorization.

1331133455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266226696.

The product of its digits is 8100, while the sum is 29.

The square root of 1331133455 is about 36484.7016569959. The cubic root of 1331133455 is about 1100.0367632341.

Adding to 1331133455 its reverse (5543311331), we get a palindrome (6874444786).

The spelling of 1331133455 in words is "one billion, three hundred thirty-one million, one hundred thirty-three thousand, four hundred fifty-five".