1331243131 has 8 divisors (see below), whose sum is σ = 1342792800. Its totient is φ = 1319738112.

The previous prime is 1331243119. The next prime is 1331243159. The reversal of 1331243131 is 1313421331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331243131 - 2¹⁷ = 1331112059 is a prime.

It is a super-2 number, since 2×1331243131² = 3544416547669366322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331243101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50170 + ... + 71968.

It is an arithmetic number, because the mean of its divisors is an integer number (167849100).

Almost surely, 2^1331243131 is an apocalyptic number.

1331243131 is a deficient number, since it is larger than the sum of its proper divisors (11549669).

1331243131 is a wasteful number, since it uses less digits than its factorization.

1331243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22325.

The product of its digits is 648, while the sum is 22.

The square root of 1331243131 is about 36486.2046669697. The cubic root of 1331243131 is about 1100.0669741591.

Adding to 1331243131 its reverse (1313421331), we get a palindrome (2644664462).

The spelling of 1331243131 in words is "one billion, three hundred thirty-one million, two hundred forty-three thousand, one hundred thirty-one".