1331132511 has 4 divisors (see below), whose sum is σ = 1774843352. Its totient is φ = 887421672.

The previous prime is 1331132501. The next prime is 1331132629. The reversal of 1331132511 is 1152311331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1331132511 - 2⁵ = 1331132479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331132501) 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, 221855416 + ... + 221855421.

It is an arithmetic number, because the mean of its divisors is an integer number (443710838).

Almost surely, 2^1331132511 is an apocalyptic number.

1331132511 is a deficient number, since it is larger than the sum of its proper divisors (443710841).

1331132511 is an equidigital number, since it uses as much as digits as its factorization.

1331132511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443710840.

The product of its digits is 270, while the sum is 21.

The square root of 1331132511 is about 36484.6887200645. The cubic root of 1331132511 is about 1100.0365031964.

Adding to 1331132511 its reverse (1152311331), we get a palindrome (2483443842).

The spelling of 1331132511 in words is "one billion, three hundred thirty-one million, one hundred thirty-two thousand, five hundred eleven".