542331021 has 8 divisors (see below), whose sum is σ = 728802304. Its totient is φ = 358706880.

The previous prime is 542331011. The next prime is 542331029. The reversal of 542331021 is 120133245.

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

It is not a de Polignac number, because 542331021 - 2⁵ = 542330989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542331029) 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 7 ways as a sum of consecutive naturals, for example, 711340 + ... + 712101.

It is an arithmetic number, because the mean of its divisors is an integer number (91100288).

Almost surely, 2^542331021 is an apocalyptic number.

It is an amenable number.

542331021 is a deficient number, since it is larger than the sum of its proper divisors (186471283).

542331021 is a wasteful number, since it uses less digits than its factorization.

542331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423571.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 542331021 is about 23288.0016532119. The cubic root of 542331021 is about 815.4953371603.

Adding to 542331021 its reverse (120133245), we get a palindrome (662464266).

The spelling of 542331021 in words is "five hundred forty-two million, three hundred thirty-one thousand, twenty-one".