1331125535 has 8 divisors (see below), whose sum is σ = 1597949856. Its totient is φ = 1064500960.

The previous prime is 1331125519. The next prime is 1331125583. The reversal of 1331125535 is 5355211331.

It is a happy number.

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

It is not a de Polignac number, because 1331125535 - 2⁴ = 1331125519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331125498 and 1331125507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34859 + ... + 62268.

It is an arithmetic number, because the mean of its divisors is an integer number (199743732).

Almost surely, 2^1331125535 is an apocalyptic number.

1331125535 is a deficient number, since it is larger than the sum of its proper divisors (266824321).

1331125535 is an equidigital number, since it uses as much as digits as its factorization.

1331125535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99873.

The product of its digits is 6750, while the sum is 29.

The square root of 1331125535 is about 36484.5931181917. The cubic root of 1331125535 is about 1100.0345815574.

Adding to 1331125535 its reverse (5355211331), we get a palindrome (6686336866).

The spelling of 1331125535 in words is "one billion, three hundred thirty-one million, one hundred twenty-five thousand, five hundred thirty-five".