162342181 has 2 divisors, whose sum is σ = 162342182. Its totient is φ = 162342180.

The previous prime is 162342161. The next prime is 162342209. The reversal of 162342181 is 181243261.

162342181 = 9009² + 9010².

It is an a-pointer prime, because the next prime (162342209) can be obtained adding 162342181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 81162081 = 9010^2 + 9009^2 .

It is a cyclic number.

It is not a de Polignac number, because 162342181 - 2⁷ = 162342053 is a prime.

It is a super-2 number, since 2×162342181² = 52709967463673522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162342161) 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, 81171090 + 81171091.

It is an arithmetic number, because the mean of its divisors is an integer number (81171091).

Almost surely, 2^162342181 is an apocalyptic number.

162342181 is the 9010-th centered square number.

It is an amenable number.

162342181 is a deficient number, since it is larger than the sum of its proper divisors (1).

162342181 is an equidigital number, since it uses as much as digits as its factorization.

162342181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 162342181 is about 12741.3571098215. The cubic root of 162342181 is about 545.5197253010.

The spelling of 162342181 in words is "one hundred sixty-two million, three hundred forty-two thousand, one hundred eighty-one".