1331388755 has 16 divisors (see below), whose sum is σ = 1612008000. Its totient is φ = 1055583360.

The previous prime is 1331388733. The next prime is 1331388761. The reversal of 1331388755 is 5578831331.

It is not a de Polignac number, because 1331388755 - 2¹⁸ = 1331126611 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 377450 + ... + 380960.

It is an arithmetic number, because the mean of its divisors is an integer number (100750500).

Almost surely, 2^1331388755 is an apocalyptic number.

1331388755 is a deficient number, since it is larger than the sum of its proper divisors (280619245).

1331388755 is a wasteful number, since it uses less digits than its factorization.

1331388755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4174.

The product of its digits is 302400, while the sum is 44.

The square root of 1331388755 is about 36488.2002159602. The cubic root of 1331388755 is about 1100.1070846163.

The spelling of 1331388755 in words is "one billion, three hundred thirty-one million, three hundred eighty-eight thousand, seven hundred fifty-five".