162110581 has 2 divisors, whose sum is σ = 162110582. Its totient is φ = 162110580.

The previous prime is 162110573. The next prime is 162110617. The reversal of 162110581 is 185011261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115992900 + 46117681 = 10770^2 + 6791^2 .

It is an emirp because it is prime and its reverse (185011261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162110581 - 2³ = 162110573 is a prime.

It is a super-2 number, since 2×162110581² = 52559680944315122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162110381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81055290 + 81055291.

It is an arithmetic number, because the mean of its divisors is an integer number (81055291).

Almost surely, 2^162110581 is an apocalyptic number.

It is an amenable number.

162110581 is a deficient number, since it is larger than the sum of its proper divisors (1).

162110581 is an equidigital number, since it uses as much as digits as its factorization.

162110581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 162110581 is about 12732.2653522458. The cubic root of 162110581 is about 545.2601860653.

The spelling of 162110581 in words is "one hundred sixty-two million, one hundred ten thousand, five hundred eighty-one".