1331475447 has 8 divisors (see below), whose sum is σ = 1793603056. Its totient is φ = 878499072.

The previous prime is 1331475437. The next prime is 1331475499. The reversal of 1331475447 is 7445741331.

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

It is not a de Polignac number, because 1331475447 - 2⁷ = 1331475319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331475427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287468 + ... + 2288049.

It is an arithmetic number, because the mean of its divisors is an integer number (224200382).

Almost surely, 2^1331475447 is an apocalyptic number.

1331475447 is a deficient number, since it is larger than the sum of its proper divisors (462127609).

1331475447 is an equidigital number, since it uses as much as digits as its factorization.

1331475447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575617.

The product of its digits is 141120, while the sum is 39.

The square root of 1331475447 is about 36489.3881423079. The cubic root of 1331475447 is about 1100.1309615426.

The spelling of 1331475447 in words is "one billion, three hundred thirty-one million, four hundred seventy-five thousand, four hundred forty-seven".