1331565241 has 8 divisors (see below), whose sum is σ = 1366775424. Its totient is φ = 1296485280.

The previous prime is 1331565229. The next prime is 1331565251. The reversal of 1331565241 is 1425651331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331565241 - 2¹¹ = 1331563193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331565251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11661 + ... + 52906.

It is an arithmetic number, because the mean of its divisors is an integer number (170846928).

Almost surely, 2^1331565241 is an apocalyptic number.

It is an amenable number.

1331565241 is a deficient number, since it is larger than the sum of its proper divisors (35210183).

1331565241 is an equidigital number, since it uses as much as digits as its factorization.

1331565241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65111.

The product of its digits is 10800, while the sum is 31.

The square root of 1331565241 is about 36490.6185340835. The cubic root of 1331565241 is about 1100.1556917368.

The spelling of 1331565241 in words is "one billion, three hundred thirty-one million, five hundred sixty-five thousand, two hundred forty-one".