165226513 has 2 divisors, whose sum is σ = 165226514. Its totient is φ = 165226512.

The previous prime is 165226507. The next prime is 165226541. The reversal of 165226513 is 315622561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158936449 + 6290064 = 12607^2 + 2508^2 .

It is a cyclic number.

It is not a de Polignac number, because 165226513 - 2¹³ = 165218321 is a prime.

It is not a weakly prime, because it can be changed into another prime (165226013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82613256 + 82613257.

It is an arithmetic number, because the mean of its divisors is an integer number (82613257).

Almost surely, 2^165226513 is an apocalyptic number.

It is an amenable number.

165226513 is a deficient number, since it is larger than the sum of its proper divisors (1).

165226513 is an equidigital number, since it uses as much as digits as its factorization.

165226513 is an odious number, because the sum of its binary digits is odd.

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

The square root of 165226513 is about 12854.0465612973. The cubic root of 165226513 is about 548.7315263350.

The spelling of 165226513 in words is "one hundred sixty-five million, two hundred twenty-six thousand, five hundred thirteen".