1331049971 has 4 divisors (see below), whose sum is σ = 1353610200. Its totient is φ = 1308489744.

The previous prime is 1331049949. The next prime is 1331049977. The reversal of 1331049971 is 1799401331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331049971 - 2¹⁸ = 1330787827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331049977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11280026 + ... + 11280143.

It is an arithmetic number, because the mean of its divisors is an integer number (338402550).

Almost surely, 2^1331049971 is an apocalyptic number.

1331049971 is a deficient number, since it is larger than the sum of its proper divisors (22560229).

1331049971 is an equidigital number, since it uses as much as digits as its factorization.

1331049971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22560228.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 1331049971 is about 36483.5575430906. The cubic root of 1331049971 is about 1100.0137659434.

The spelling of 1331049971 in words is "one billion, three hundred thirty-one million, forty-nine thousand, nine hundred seventy-one".