542821030391 has 8 divisors (see below), whose sum is σ = 546781591440. Its totient is φ = 538861260672.

The previous prime is 542821030387. The next prime is 542821030439. The reversal of 542821030391 is 193030128245.

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 542821030391 - 2² = 542821030387 is a prime.

It is a super-2 number, since 2×542821030391² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542821030321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215791 + ... + 1601183.

It is an arithmetic number, because the mean of its divisors is an integer number (68347698930).

Almost surely, 2^542821030391 is an apocalyptic number.

542821030391 is a deficient number, since it is larger than the sum of its proper divisors (3960561049).

542821030391 is a wasteful number, since it uses less digits than its factorization.

542821030391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395665.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 542821030391 in words is "five hundred forty-two billion, eight hundred twenty-one million, thirty thousand, three hundred ninety-one".