1331434505 has 4 divisors (see below), whose sum is σ = 1597721412. Its totient is φ = 1065147600.

The previous prime is 1331434501. The next prime is 1331434537. The reversal of 1331434505 is 5054341331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 877403641 + 454030864 = 29621^2 + 21308^2 .

It is not a de Polignac number, because 1331434505 - 2² = 1331434501 is a prime.

It is a super-2 number, since 2×1331434505² = 3545435682209190050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331434501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133143446 + ... + 133143455.

It is an arithmetic number, because the mean of its divisors is an integer number (399430353).

Almost surely, 2^1331434505 is an apocalyptic number.

It is an amenable number.

1331434505 is a deficient number, since it is larger than the sum of its proper divisors (266286907).

1331434505 is an equidigital number, since it uses as much as digits as its factorization.

1331434505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266286906.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 1331434505 is about 36488.8271255737. The cubic root of 1331434505 is about 1100.1196853243.

Adding to 1331434505 its reverse (5054341331), we get a palindrome (6385775836).

The spelling of 1331434505 in words is "one billion, three hundred thirty-one million, four hundred thirty-four thousand, five hundred five".