1331431266 has 32 divisors (see below), whose sum is σ = 2906280000. Its totient is φ = 403278080.

The previous prime is 1331431261. The next prime is 1331431331. The reversal of 1331431266 is 6621341331.

It is not an unprimeable number, because it can be changed into a prime (1331431261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224710 + ... + 230558.

It is an arithmetic number, because the mean of its divisors is an integer number (90821250).

Almost surely, 2^1331431266 is an apocalyptic number.

1331431266 is an abundant number, since it is smaller than the sum of its proper divisors (1574848734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331431266 is a wasteful number, since it uses less digits than its factorization.

1331431266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9314.

The product of its digits is 7776, while the sum is 30.

The square root of 1331431266 is about 36488.7827420976. The cubic root of 1331431266 is about 1100.1187932312.

Adding to 1331431266 its reverse (6621341331), we get a palindrome (7952772597).

The spelling of 1331431266 in words is "one billion, three hundred thirty-one million, four hundred thirty-one thousand, two hundred sixty-six".