162155509 has 2 divisors, whose sum is σ = 162155510. Its totient is φ = 162155508.

The previous prime is 162155491. The next prime is 162155527. The reversal of 162155509 is 905551261.

It is a balanced prime because it is at equal distance from previous prime (162155491) and next prime (162155527).

It can be written as a sum of positive squares in only one way, i.e., 90668484 + 71487025 = 9522^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 162155509 - 2¹³ = 162147317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162155549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81077754 + 81077755.

It is an arithmetic number, because the mean of its divisors is an integer number (81077755).

Almost surely, 2^162155509 is an apocalyptic number.

It is an amenable number.

162155509 is a deficient number, since it is larger than the sum of its proper divisors (1).

162155509 is an equidigital number, since it uses as much as digits as its factorization.

162155509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 162155509 is about 12734.0295664805. The cubic root of 162155509 is about 545.3105533038.

The spelling of 162155509 in words is "one hundred sixty-two million, one hundred fifty-five thousand, five hundred nine".