162218399 has 4 divisors (see below), whose sum is σ = 185392464. Its totient is φ = 139044336.

The previous prime is 162218389. The next prime is 162218411. The reversal of 162218399 is 993812261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162218399 - 2²⁰ = 161169823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162218339) 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, 11587022 + ... + 11587035.

It is an arithmetic number, because the mean of its divisors is an integer number (46348116).

Almost surely, 2^162218399 is an apocalyptic number.

162218399 is a deficient number, since it is larger than the sum of its proper divisors (23174065).

162218399 is an equidigital number, since it uses as much as digits as its factorization.

162218399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23174064.

The product of its digits is 46656, while the sum is 41.

The square root of 162218399 is about 12736.4986946963. The cubic root of 162218399 is about 545.3810415001.

The spelling of 162218399 in words is "one hundred sixty-two million, two hundred eighteen thousand, three hundred ninety-nine".