162316621 has 2 divisors, whose sum is σ = 162316622. Its totient is φ = 162316620.

The previous prime is 162316607. The next prime is 162316691. The reversal of 162316621 is 126613261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117614025 + 44702596 = 10845^2 + 6686^2 .

It is a cyclic number.

It is not a de Polignac number, because 162316621 - 2⁹ = 162316109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 162316621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162316691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81158310 + 81158311.

It is an arithmetic number, because the mean of its divisors is an integer number (81158311).

Almost surely, 2^162316621 is an apocalyptic number.

It is an amenable number.

162316621 is a deficient number, since it is larger than the sum of its proper divisors (1).

162316621 is an equidigital number, since it uses as much as digits as its factorization.

162316621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 162316621 is about 12740.3540374669. The cubic root of 162316621 is about 545.4910939744.

Adding to 162316621 its reverse (126613261), we get a palindrome (288929882).

The spelling of 162316621 in words is "one hundred sixty-two million, three hundred sixteen thousand, six hundred twenty-one".