80551591 has 2 divisors, whose sum is σ = 80551592. Its totient is φ = 80551590.

The previous prime is 80551529. The next prime is 80551649. The reversal of 80551591 is 19515508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80551591 - 2⁷ = 80551463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80551501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40275795 + 40275796.

It is an arithmetic number, because the mean of its divisors is an integer number (40275796).

Almost surely, 2^80551591 is an apocalyptic number.

80551591 is a deficient number, since it is larger than the sum of its proper divisors (1).

80551591 is an equidigital number, since it uses as much as digits as its factorization.

80551591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 80551591 is about 8975.0538159946. The cubic root of 80551591 is about 431.8749763237.

The spelling of 80551591 in words is "eighty million, five hundred fifty-one thousand, five hundred ninety-one".