541502021 has 4 divisors (see below), whose sum is σ = 541548672. Its totient is φ = 541455372.

The previous prime is 541502011. The next prime is 541502051. The reversal of 541502021 is 120205145.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-541502021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 541501984 and 541502002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541502011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9266 + ... + 34188.

It is an arithmetic number, because the mean of its divisors is an integer number (135387168).

Almost surely, 2^541502021 is an apocalyptic number.

It is an amenable number.

541502021 is a deficient number, since it is larger than the sum of its proper divisors (46651).

541502021 is a wasteful number, since it uses less digits than its factorization.

541502021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46650.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 541502021 is about 23270.1959811257. The cubic root of 541502021 is about 815.0796068124.

Adding to 541502021 its reverse (120205145), we get a palindrome (661707166).

The spelling of 541502021 in words is "five hundred forty-one million, five hundred two thousand, twenty-one".