1331132550 has 96 divisors (see below), whose sum is σ = 3655373184. Its totient is φ = 317856000.

The previous prime is 1331132501. The next prime is 1331132629. The reversal of 1331132550 is 552311331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331132550.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 104530 + ... + 116570.

It is an arithmetic number, because the mean of its divisors is an integer number (38076804).

Almost surely, 2^1331132550 is an apocalyptic number.

1331132550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331132550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827686592).

1331132550 is an abundant number, since it is smaller than the sum of its proper divisors (2324240634).

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

1331132550 is a wasteful number, since it uses less digits than its factorization.

1331132550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12134 (or 12129 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1331132550 is about 36484.6892545353. The cubic root of 1331132550 is about 1100.0365139394.

Adding to 1331132550 its reverse (552311331), we get a palindrome (1883443881).

The spelling of 1331132550 in words is "one billion, three hundred thirty-one million, one hundred thirty-two thousand, five hundred fifty".