162431161 has 2 divisors, whose sum is σ = 162431162. Its totient is φ = 162431160.

The previous prime is 162431149. The next prime is 162431177. The reversal of 162431161 is 161134261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108555561 + 53875600 = 10419^2 + 7340^2 .

It is an emirp because it is prime and its reverse (161134261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162431161 - 2¹³ = 162422969 is a prime.

It is not a weakly prime, because it can be changed into another prime (162431111) 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, 81215580 + 81215581.

It is an arithmetic number, because the mean of its divisors is an integer number (81215581).

Almost surely, 2^162431161 is an apocalyptic number.

It is an amenable number.

162431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

162431161 is an equidigital number, since it uses as much as digits as its factorization.

162431161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 162431161 is about 12744.8484102401. The cubic root of 162431161 is about 545.6193738319.

The spelling of 162431161 in words is "one hundred sixty-two million, four hundred thirty-one thousand, one hundred sixty-one".