162221819 has 8 divisors (see below), whose sum is σ = 163273440. Its totient is φ = 161174016.

The previous prime is 162221809. The next prime is 162221821. The reversal of 162221819 is 918122261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162221819 is a prime.

It is a super-2 number, since 2×162221819² = 52631837119337522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162221809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151217 + ... + 152285.

It is an arithmetic number, because the mean of its divisors is an integer number (20409180).

Almost surely, 2^162221819 is an apocalyptic number.

162221819 is a deficient number, since it is larger than the sum of its proper divisors (1051621).

162221819 is a wasteful number, since it uses less digits than its factorization.

162221819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909.

The product of its digits is 3456, while the sum is 32.

The square root of 162221819 is about 12736.6329538069. The cubic root of 162221819 is about 545.3848741728.

The spelling of 162221819 in words is "one hundred sixty-two million, two hundred twenty-one thousand, eight hundred nineteen".