581481851 has 2 divisors, whose sum is σ = 581481852. Its totient is φ = 581481850.

The previous prime is 581481827. The next prime is 581481853. The reversal of 581481851 is 158184185.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-581481851 is a prime.

It is a super-2 number, since 2×581481851² = 676242286084772402, which contains 22 as substring.

Together with 581481853, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 581481799 and 581481808.

It is not a weakly prime, because it can be changed into another prime (581481853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290740925 + 290740926.

It is an arithmetic number, because the mean of its divisors is an integer number (290740926).

Almost surely, 2^581481851 is an apocalyptic number.

581481851 is a deficient number, since it is larger than the sum of its proper divisors (1).

581481851 is an equidigital number, since it uses as much as digits as its factorization.

581481851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51200, while the sum is 41.

The square root of 581481851 is about 24113.9347888311. The cubic root of 581481851 is about 834.6647158076.

The spelling of 581481851 in words is "five hundred eighty-one million, four hundred eighty-one thousand, eight hundred fifty-one".