581537442 has 8 divisors (see below), whose sum is σ = 1163074896. Its totient is φ = 193845812.

The previous prime is 581537441. The next prime is 581537449. The reversal of 581537442 is 244735185.

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

581537442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 581537442.

It is not an unprimeable number, because it can be changed into a prime (581537441) 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 3 ways as a sum of consecutive naturals, for example, 48461448 + ... + 48461459.

It is an arithmetic number, because the mean of its divisors is an integer number (145384362).

Almost surely, 2^581537442 is an apocalyptic number.

581537442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

581537442 is a wasteful number, since it uses less digits than its factorization.

581537442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96922912.

The product of its digits is 134400, while the sum is 39.

The square root of 581537442 is about 24115.0874350478. The cubic root of 581537442 is about 834.6913135811.

The spelling of 581537442 in words is "five hundred eighty-one million, five hundred thirty-seven thousand, four hundred forty-two".