541931521 has 4 divisors (see below), whose sum is σ = 542011392. Its totient is φ = 541851652.

The previous prime is 541931441. The next prime is 541931549. The reversal of 541931521 is 125139145.

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 541931521 - 2¹⁷ = 541800449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541931561) 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, 28705 + ... + 43678.

It is an arithmetic number, because the mean of its divisors is an integer number (135502848).

Almost surely, 2^541931521 is an apocalyptic number.

It is an amenable number.

541931521 is a deficient number, since it is larger than the sum of its proper divisors (79871).

541931521 is an equidigital number, since it uses as much as digits as its factorization.

541931521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79870.

The product of its digits is 5400, while the sum is 31.

The square root of 541931521 is about 23279.4226947319. The cubic root of 541931521 is about 815.2950471753.

The spelling of 541931521 in words is "five hundred forty-one million, nine hundred thirty-one thousand, five hundred twenty-one".