541915921 has 2 divisors, whose sum is σ = 541915922. Its totient is φ = 541915920.

The previous prime is 541915889. The next prime is 541915939. The reversal of 541915921 is 129519145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274233600 + 267682321 = 16560^2 + 16361^2 .

It is a cyclic number.

It is not a de Polignac number, because 541915921 - 2⁵ = 541915889 is a prime.

It is a Chen prime.

It is equal to p_28443574 and since 541915921 and 28443574 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (541915981) 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 as a sum of consecutive naturals, namely, 270957960 + 270957961.

It is an arithmetic number, because the mean of its divisors is an integer number (270957961).

Almost surely, 2^541915921 is an apocalyptic number.

It is an amenable number.

541915921 is a deficient number, since it is larger than the sum of its proper divisors (1).

541915921 is an equidigital number, since it uses as much as digits as its factorization.

541915921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 37.

The square root of 541915921 is about 23279.0876324653. The cubic root of 541915921 is about 815.2872240930.

The spelling of 541915921 in words is "five hundred forty-one million, nine hundred fifteen thousand, nine hundred twenty-one".