581359881 has 4 divisors (see below), whose sum is σ = 775146512. Its totient is φ = 387573252.

The previous prime is 581359859. The next prime is 581359903. The reversal of 581359881 is 188953185.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (581359859) and next prime (581359903).

It is not a de Polignac number, because 581359881 - 2⁶ = 581359817 is a prime.

It is a super-2 number, since 2×581359881² = 675958622472668322, 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 581359881.

It is not an unprimeable number, because it can be changed into a prime (581359381) 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, 96893311 + ... + 96893316.

It is an arithmetic number, because the mean of its divisors is an integer number (193786628).

Almost surely, 2^581359881 is an apocalyptic number.

It is an amenable number.

581359881 is a deficient number, since it is larger than the sum of its proper divisors (193786631).

581359881 is a wasteful number, since it uses less digits than its factorization.

581359881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193786630.

The product of its digits is 345600, while the sum is 48.

The square root of 581359881 is about 24111.4056205772. The cubic root of 581359881 is about 834.6063527512.

The spelling of 581359881 in words is "five hundred eighty-one million, three hundred fifty-nine thousand, eight hundred eighty-one".