542731681 has 16 divisors (see below), whose sum is σ = 593923968. Its totient is φ = 493920000.

The previous prime is 542731669. The next prime is 542731697. The reversal of 542731681 is 186137245.

It is a cyclic number.

It is not a de Polignac number, because 542731681 - 2⁹ = 542731169 is a prime.

It is a super-2 number, since 2×542731681² = 589115355122171522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 542731681.

It is not an unprimeable number, because it can be changed into a prime (542731381) 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 15 ways as a sum of consecutive naturals, for example, 70156 + ... + 77506.

It is an arithmetic number, because the mean of its divisors is an integer number (37120248).

Almost surely, 2^542731681 is an apocalyptic number.

It is an amenable number.

542731681 is a deficient number, since it is larger than the sum of its proper divisors (51192287).

542731681 is a wasteful number, since it uses less digits than its factorization.

542731681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7512.

The product of its digits is 40320, while the sum is 37.

The square root of 542731681 is about 23296.6023488405. The cubic root of 542731681 is about 815.6961099484.

The spelling of 542731681 in words is "five hundred forty-two million, seven hundred thirty-one thousand, six hundred eighty-one".