581130733 has 4 divisors (see below), whose sum is σ = 581496220. Its totient is φ = 580765248.

The previous prime is 581130677. The next prime is 581130757. The reversal of 581130733 is 337031185.

It is a happy number.

581130733 is nontrivially palindromic in base 3.

It is the 9842-nd star number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34833604 + 546297129 = 5902^2 + 23373^2 .

It is a 3-Lehmer number, since φ(581130733) divides (581130733-1)³.

It is a cyclic number.

It is not a de Polignac number, because 581130733 - 2¹³ = 581122541 is a prime.

It is a Duffinian number.

581130733 is a nontrivial repdigit in base 3.

It is a plaindrome in base 3 and base 9.

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 581130695 and 581130704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581133733) by changing a digit.

It is a nontrivial repunit in base 3.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180348 + ... + 183541.

It is an arithmetic number, because the mean of its divisors is an integer number (145374055).

Almost surely, 2^581130733 is an apocalyptic number.

It is an amenable number.

581130733 is a deficient number, since it is larger than the sum of its proper divisors (365487).

581130733 is a wasteful number, since it uses less digits than its factorization.

581130733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365486.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 581130733 is about 24106.6532932301. The cubic root of 581130733 is about 834.4966825820.

The spelling of 581130733 in words is "five hundred eighty-one million, one hundred thirty thousand, seven hundred thirty-three".