541521997 has 8 divisors (see below), whose sum is σ = 549210816. Its totient is φ = 533876352.

The previous prime is 541521989. The next prime is 541522019. The reversal of 541521997 is 799125145.

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

It is a cyclic number.

It is not a de Polignac number, because 541521997 - 2³ = 541521989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541521917) 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 in 7 ways as a sum of consecutive naturals, for example, 14898 + ... + 36124.

It is an arithmetic number, because the mean of its divisors is an integer number (68651352).

Almost surely, 2^541521997 is an apocalyptic number.

It is an amenable number.

541521997 is a deficient number, since it is larger than the sum of its proper divisors (7688819).

541521997 is a wasteful number, since it uses less digits than its factorization.

541521997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21587.

The product of its digits is 113400, while the sum is 43.

The square root of 541521997 is about 23270.6251957269. The cubic root of 541521997 is about 815.0896294466.

The spelling of 541521997 in words is "five hundred forty-one million, five hundred twenty-one thousand, nine hundred ninety-seven".