1331215271 has 2 divisors, whose sum is σ = 1331215272. Its totient is φ = 1331215270.

The previous prime is 1331215241. The next prime is 1331215279. The reversal of 1331215271 is 1725121331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331215271 - 2²² = 1327020967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331215271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331215279) 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 as a sum of consecutive naturals, namely, 665607635 + 665607636.

It is an arithmetic number, because the mean of its divisors is an integer number (665607636).

Almost surely, 2^1331215271 is an apocalyptic number.

1331215271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331215271 is an equidigital number, since it uses as much as digits as its factorization.

1331215271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 1331215271 is about 36485.8228768381. The cubic root of 1331215271 is about 1100.0593001089.

The spelling of 1331215271 in words is "one billion, three hundred thirty-one million, two hundred fifteen thousand, two hundred seventy-one".