162218461 has 2 divisors, whose sum is σ = 162218462. Its totient is φ = 162218460.

The previous prime is 162218453. The next prime is 162218477. The reversal of 162218461 is 164812261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123343236 + 38875225 = 11106^2 + 6235^2 .

It is an emirp because it is prime and its reverse (164812261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162218461 - 2³ = 162218453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162218411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81109230 + 81109231.

It is an arithmetic number, because the mean of its divisors is an integer number (81109231).

Almost surely, 2^162218461 is an apocalyptic number.

It is an amenable number.

162218461 is a deficient number, since it is larger than the sum of its proper divisors (1).

162218461 is an equidigital number, since it uses as much as digits as its factorization.

162218461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 162218461 is about 12736.5011286460. The cubic root of 162218461 is about 545.3811109818.

The spelling of 162218461 in words is "one hundred sixty-two million, two hundred eighteen thousand, four hundred sixty-one".