542318581 has 16 divisors (see below), whose sum is σ = 659577600. Its totient is φ = 435283200.

The previous prime is 542318551. The next prime is 542318599. The reversal of 542318581 is 185813245.

It is a cyclic number.

It is not a de Polignac number, because 542318581 - 2¹⁵ = 542285813 is a prime.

It is a super-2 number, since 2×542318581² = 588218886595707122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542318581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542318551) 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, 12231 + ... + 35131.

It is an arithmetic number, because the mean of its divisors is an integer number (41223600).

Almost surely, 2^542318581 is an apocalyptic number.

It is an amenable number.

542318581 is a deficient number, since it is larger than the sum of its proper divisors (117259019).

542318581 is a wasteful number, since it uses less digits than its factorization.

542318581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23124.

The product of its digits is 38400, while the sum is 37.

The square root of 542318581 is about 23287.7345613522. The cubic root of 542318581 is about 815.4891018298.

The spelling of 542318581 in words is "five hundred forty-two million, three hundred eighteen thousand, five hundred eighty-one".