162043561 has 4 divisors (see below), whose sum is σ = 167631300. Its totient is φ = 156455824.

The previous prime is 162043549. The next prime is 162043573. The reversal of 162043561 is 165340261.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (162043549) and next prime (162043573).

It can be written as a sum of positive squares in 2 ways, for example, as 112763161 + 49280400 = 10619^2 + 7020^2 .

It is a cyclic number.

It is not a de Polignac number, because 162043561 - 2⁵ = 162043529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162043361) 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 in 3 ways as a sum of consecutive naturals, for example, 2793826 + ... + 2793883.

It is an arithmetic number, because the mean of its divisors is an integer number (41907825).

Almost surely, 2^162043561 is an apocalyptic number.

It is an amenable number.

162043561 is a deficient number, since it is larger than the sum of its proper divisors (5587739).

162043561 is an equidigital number, since it uses as much as digits as its factorization.

162043561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587738.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 162043561 is about 12729.6331840317. The cubic root of 162043561 is about 545.1850349462.

The spelling of 162043561 in words is "one hundred sixty-two million, forty-three thousand, five hundred sixty-one".