80810251 has 2 divisors, whose sum is σ = 80810252. Its totient is φ = 80810250.

The previous prime is 80810243. The next prime is 80810297. The reversal of 80810251 is 15201808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80810251 - 2³ = 80810243 is a prime.

It is not a weakly prime, because it can be changed into another prime (80820251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40405125 + 40405126.

It is an arithmetic number, because the mean of its divisors is an integer number (40405126).

Almost surely, 2^80810251 is an apocalyptic number.

80810251 is a deficient number, since it is larger than the sum of its proper divisors (1).

80810251 is an equidigital number, since it uses as much as digits as its factorization.

80810251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 80810251 is about 8989.4522080047. The cubic root of 80810251 is about 432.3367483926.

The spelling of 80810251 in words is "eighty million, eight hundred ten thousand, two hundred fifty-one".