162121228 has 12 divisors (see below), whose sum is σ = 284063472. Its totient is φ = 80960240.

The previous prime is 162121199. The next prime is 162121229. The reversal of 162121228 is 822121261.

It is not an unprimeable number, because it can be changed into a prime (162121229) 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, 21400 + ... + 27967.

It is an arithmetic number, because the mean of its divisors is an integer number (23671956).

Almost surely, 2^162121228 is an apocalyptic number.

It is an amenable number.

162121228 is a deficient number, since it is larger than the sum of its proper divisors (121942244).

162121228 is a wasteful number, since it uses less digits than its factorization.

162121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50192 (or 50190 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 162121228 is about 12732.6834563654. The cubic root of 162121228 is about 545.2721228928.

Adding to 162121228 its reverse (822121261), we get a palindrome (984242489).

The spelling of 162121228 in words is "one hundred sixty-two million, one hundred twenty-one thousand, two hundred twenty-eight".