80520101 has 2 divisors, whose sum is σ = 80520102. Its totient is φ = 80520100.

The previous prime is 80520031. The next prime is 80520127. The reversal of 80520101 is 10102508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 3062500 = 8801^2 + 1750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80520101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80520101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80520301) 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, 40260050 + 40260051.

It is an arithmetic number, because the mean of its divisors is an integer number (40260051).

Almost surely, 2^80520101 is an apocalyptic number.

It is an amenable number.

80520101 is a deficient number, since it is larger than the sum of its proper divisors (1).

80520101 is an equidigital number, since it uses as much as digits as its factorization.

80520101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 80520101 is about 8973.2993374789. The cubic root of 80520101 is about 431.8186914202.

Adding to 80520101 its reverse (10102508), we get a palindrome (90622609).

The spelling of 80520101 in words is "eighty million, five hundred twenty thousand, one hundred one".