161241563 has 4 divisors (see below), whose sum is σ = 184276080. Its totient is φ = 138207048.

The previous prime is 161241517. The next prime is 161241593. The reversal of 161241563 is 365142161.

It is a happy number.

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

It is not a de Polignac number, because 161241563 - 2⁶ = 161241499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161241503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11517248 + ... + 11517261.

It is an arithmetic number, because the mean of its divisors is an integer number (46069020).

Almost surely, 2^161241563 is an apocalyptic number.

161241563 is a deficient number, since it is larger than the sum of its proper divisors (23034517).

161241563 is an equidigital number, since it uses as much as digits as its factorization.

161241563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23034516.

The product of its digits is 4320, while the sum is 29.

The square root of 161241563 is about 12698.0928883041. The cubic root of 161241563 is about 544.2841236302.

The spelling of 161241563 in words is "one hundred sixty-one million, two hundred forty-one thousand, five hundred sixty-three".