162240809 has 4 divisors (see below), whose sum is σ = 171784404. Its totient is φ = 152697216.

The previous prime is 162240803. The next prime is 162240811. The reversal of 162240809 is 908042261.

162240809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908042261 = 7 ⋅129720323.

It can be written as a sum of positive squares in 2 ways, for example, as 95981209 + 66259600 = 9797^2 + 8140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162240809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162240803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4771772 + ... + 4771805.

It is an arithmetic number, because the mean of its divisors is an integer number (42946101).

Almost surely, 2^162240809 is an apocalyptic number.

It is an amenable number.

162240809 is a deficient number, since it is larger than the sum of its proper divisors (9543595).

162240809 is an equidigital number, since it uses as much as digits as its factorization.

162240809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543594.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 162240809 is about 12737.3784194394. The cubic root of 162240809 is about 545.4061546119.

The spelling of 162240809 in words is "one hundred sixty-two million, two hundred forty thousand, eight hundred nine".