801336581 has 2 divisors, whose sum is σ = 801336582. Its totient is φ = 801336580.

The previous prime is 801336551. The next prime is 801336607. The reversal of 801336581 is 185633108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 663062500 + 138274081 = 25750^2 + 11759^2 .

It is a cyclic number.

It is not a de Polignac number, because 801336581 - 2⁶ = 801336517 is a prime.

It is a super-2 number, since 2×801336581² = 1284280632097539122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801336551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400668290 + 400668291.

It is an arithmetic number, because the mean of its divisors is an integer number (400668291).

Almost surely, 2^801336581 is an apocalyptic number.

It is an amenable number.

801336581 is a deficient number, since it is larger than the sum of its proper divisors (1).

801336581 is an equidigital number, since it uses as much as digits as its factorization.

801336581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 801336581 is about 28307.8890240866. The cubic root of 801336581 is about 928.8344673613.

Adding to 801336581 its reverse (185633108), we get a palindrome (986969689).

The spelling of 801336581 in words is "eight hundred one million, three hundred thirty-six thousand, five hundred eighty-one".