162081217 has 4 divisors (see below), whose sum is σ = 162120640. Its totient is φ = 162041796.

The previous prime is 162081197. The next prime is 162081221. The reversal of 162081217 is 712180261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 162081217 - 2²⁷ = 27863489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162081317) 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, 12717 + ... + 22042.

It is an arithmetic number, because the mean of its divisors is an integer number (40530160).

Almost surely, 2^162081217 is an apocalyptic number.

It is an amenable number.

162081217 is a deficient number, since it is larger than the sum of its proper divisors (39423).

162081217 is an equidigital number, since it uses as much as digits as its factorization.

162081217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39422.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 162081217 is about 12731.1121666569. The cubic root of 162081217 is about 545.2272620640.

The spelling of 162081217 in words is "one hundred sixty-two million, eighty-one thousand, two hundred seventeen".