162123213 has 12 divisors (see below), whose sum is σ = 251456640. Its totient is φ = 92641752.

The previous prime is 162123191. The next prime is 162123229. The reversal of 162123213 is 312321261.

It is not a de Polignac number, because 162123213 - 2¹⁰ = 162122189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 162123213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162123293) 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, 551293 + ... + 551586.

It is an arithmetic number, because the mean of its divisors is an integer number (20954720).

Almost surely, 2^162123213 is an apocalyptic number.

It is an amenable number.

162123213 is a deficient number, since it is larger than the sum of its proper divisors (89333427).

162123213 is a wasteful number, since it uses less digits than its factorization.

162123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102896 (or 1102889 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 162123213 is about 12732.7614051313. The cubic root of 162123213 is about 545.2743483072.

Adding to 162123213 its reverse (312321261), we get a palindrome (474444474).

The spelling of 162123213 in words is "one hundred sixty-two million, one hundred twenty-three thousand, two hundred thirteen".