541565161 has 4 divisors (see below), whose sum is σ = 553087872. Its totient is φ = 530042452.

The previous prime is 541565159. The next prime is 541565197. The reversal of 541565161 is 161565145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 541565161 - 2¹ = 541565159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541565561) 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, 5761285 + ... + 5761378.

It is an arithmetic number, because the mean of its divisors is an integer number (138271968).

Almost surely, 2^541565161 is an apocalyptic number.

It is an amenable number.

541565161 is a deficient number, since it is larger than the sum of its proper divisors (11522711).

541565161 is a wasteful number, since it uses less digits than its factorization.

541565161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11522710.

The product of its digits is 18000, while the sum is 34.

The square root of 541565161 is about 23271.5526125783. The cubic root of 541565161 is about 815.1112854423. Note that the first 3 decimals are identical.

The spelling of 541565161 in words is "five hundred forty-one million, five hundred sixty-five thousand, one hundred sixty-one".