80520851 has 2 divisors, whose sum is σ = 80520852. Its totient is φ = 80520850.

The previous prime is 80520827. The next prime is 80520863. The reversal of 80520851 is 15802508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80520851 - 2¹⁰ = 80519827 is a prime.

It is not a weakly prime, because it can be changed into another prime (80520821) 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, 40260425 + 40260426.

It is an arithmetic number, because the mean of its divisors is an integer number (40260426).

Almost surely, 2^80520851 is an apocalyptic number.

80520851 is a deficient number, since it is larger than the sum of its proper divisors (1).

80520851 is an equidigital number, since it uses as much as digits as its factorization.

80520851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 80520851 is about 8973.3411280303. The cubic root of 80520851 is about 431.8200321331.

The spelling of 80520851 in words is "eighty million, five hundred twenty thousand, eight hundred fifty-one".