162213021 has 12 divisors (see below), whose sum is σ = 235050972. Its totient is φ = 107798976.

The previous prime is 162213011. The next prime is 162213047. The reversal of 162213021 is 120312261.

It can be written as a sum of positive squares in 2 ways, for example, as 32936121 + 129276900 = 5739^2 + 11370^2 .

It is not a de Polignac number, because 162213021 - 2⁷ = 162212893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 162212985 and 162213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162213001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25576 + ... + 31281.

It is an arithmetic number, because the mean of its divisors is an integer number (19587581).

Almost surely, 2^162213021 is an apocalyptic number.

It is an amenable number.

162213021 is a deficient number, since it is larger than the sum of its proper divisors (72837951).

162213021 is a wasteful number, since it uses less digits than its factorization.

162213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57180 (or 57177 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 162213021 is about 12736.2875674193. The cubic root of 162213021 is about 545.3750144574.

Adding to 162213021 its reverse (120312261), we get a palindrome (282525282).

The spelling of 162213021 in words is "one hundred sixty-two million, two hundred thirteen thousand, twenty-one".