162206021 has 4 divisors (see below), whose sum is σ = 170743200. Its totient is φ = 153668844.

The previous prime is 162206003. The next prime is 162206029. The reversal of 162206021 is 120602261.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120602261 = 13 ⋅9277097.

It is a cyclic number.

It is not a de Polignac number, because 162206021 - 2²² = 158011717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162205984 and 162206002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162206029) 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, 4268561 + ... + 4268598.

It is an arithmetic number, because the mean of its divisors is an integer number (42685800).

Almost surely, 2^162206021 is an apocalyptic number.

It is an amenable number.

162206021 is a deficient number, since it is larger than the sum of its proper divisors (8537179).

162206021 is an equidigital number, since it uses as much as digits as its factorization.

162206021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8537178.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 162206021 is about 12736.0127591016. The cubic root of 162206021 is about 545.3671694645.

Adding to 162206021 its reverse (120602261), we get a palindrome (282808282).

The spelling of 162206021 in words is "one hundred sixty-two million, two hundred six thousand, twenty-one".