162107821 has 2 divisors, whose sum is σ = 162107822. Its totient is φ = 162107820.

The previous prime is 162107797. The next prime is 162107833. The reversal of 162107821 is 128701261.

162107821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143280900 + 18826921 = 11970^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 162107821 - 2⁵ = 162107789 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 162107821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162107851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81053910 + 81053911.

It is an arithmetic number, because the mean of its divisors is an integer number (81053911).

Almost surely, 2^162107821 is an apocalyptic number.

It is an amenable number.

162107821 is a deficient number, since it is larger than the sum of its proper divisors (1).

162107821 is an equidigital number, since it uses as much as digits as its factorization.

162107821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 162107821 is about 12732.1569657305. The cubic root of 162107821 is about 545.2570916207.

The spelling of 162107821 in words is "one hundred sixty-two million, one hundred seven thousand, eight hundred twenty-one".