541521561 has 8 divisors (see below), whose sum is σ = 825175744. Its totient is φ = 309440880.

The previous prime is 541521557. The next prime is 541521571. The reversal of 541521561 is 165125145.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 541521561 - 2² = 541521557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541521571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12893350 + ... + 12893391.

It is an arithmetic number, because the mean of its divisors is an integer number (103146968).

Almost surely, 2^541521561 is an apocalyptic number.

It is an amenable number.

541521561 is a deficient number, since it is larger than the sum of its proper divisors (283654183).

541521561 is a wasteful number, since it uses less digits than its factorization.

541521561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25786751.

The product of its digits is 6000, while the sum is 30.

The square root of 541521561 is about 23270.6158276914. The cubic root of 541521561 is about 815.0894106933.

The spelling of 541521561 in words is "five hundred forty-one million, five hundred twenty-one thousand, five hundred sixty-one".