80372581 has 2 divisors, whose sum is σ = 80372582. Its totient is φ = 80372580.

The previous prime is 80372569. The next prime is 80372629. The reversal of 80372581 is 18527308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80263681 + 108900 = 8959^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 80372581 - 2⁹ = 80372069 is a prime.

It is a super-2 number, since 2×80372581² = 12919503553203122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80372521) 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 as a sum of consecutive naturals, namely, 40186290 + 40186291.

It is an arithmetic number, because the mean of its divisors is an integer number (40186291).

Almost surely, 2^80372581 is an apocalyptic number.

It is an amenable number.

80372581 is a deficient number, since it is larger than the sum of its proper divisors (1).

80372581 is an equidigital number, since it uses as much as digits as its factorization.

80372581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 80372581 is about 8965.0756271211. The cubic root of 80372581 is about 431.5548201022.

Adding to 80372581 its reverse (18527308), we get a palindrome (98899889).

The spelling of 80372581 in words is "eighty million, three hundred seventy-two thousand, five hundred eighty-one".