541501221 has 16 divisors (see below), whose sum is σ = 764952768. Its totient is φ = 339552000.

The previous prime is 541501217. The next prime is 541501243. The reversal of 541501221 is 122105145.

It is not a de Polignac number, because 541501221 - 2² = 541501217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541501291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131646 + ... + 135696.

It is an arithmetic number, because the mean of its divisors is an integer number (47809548).

Almost surely, 2^541501221 is an apocalyptic number.

541501221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

541501221 is a deficient number, since it is larger than the sum of its proper divisors (223451547).

541501221 is a wasteful number, since it uses less digits than its factorization.

541501221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 541501221 is about 23270.1787917498. The cubic root of 541501221 is about 815.0792054203.

Adding to 541501221 its reverse (122105145), we get a palindrome (663606366).

The spelling of 541501221 in words is "five hundred forty-one million, five hundred one thousand, two hundred twenty-one".