1331557613 has 2 divisors, whose sum is σ = 1331557614. Its totient is φ = 1331557612.

The previous prime is 1331557553. The next prime is 1331557673. The reversal of 1331557613 is 3167551331.

It is a balanced prime because it is at equal distance from previous prime (1331557553) and next prime (1331557673).

It can be written as a sum of positive squares in only one way, i.e., 1321904164 + 9653449 = 36358^2 + 3107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331557613 - 2¹⁴ = 1331541229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331557673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665778806 + 665778807.

It is an arithmetic number, because the mean of its divisors is an integer number (665778807).

Almost surely, 2^1331557613 is an apocalyptic number.

It is an amenable number.

1331557613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331557613 is an equidigital number, since it uses as much as digits as its factorization.

1331557613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 1331557613 is about 36490.5140139187. The cubic root of 1331557613 is about 1100.1535909501.

The spelling of 1331557613 in words is "one billion, three hundred thirty-one million, five hundred fifty-seven thousand, six hundred thirteen".