80213501 has 2 divisors, whose sum is σ = 80213502. Its totient is φ = 80213500.

The previous prime is 80213467. The next prime is 80213503. The reversal of 80213501 is 10531208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 15007876 = 8075^2 + 3874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80213501 is a prime.

Together with 80213503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80213503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40106750 + 40106751.

It is an arithmetic number, because the mean of its divisors is an integer number (40106751).

Almost surely, 2^80213501 is an apocalyptic number.

It is an amenable number.

80213501 is a deficient number, since it is larger than the sum of its proper divisors (1).

80213501 is an equidigital number, since it uses as much as digits as its factorization.

80213501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 80213501 is about 8956.1990263727. The cubic root of 80213501 is about 431.2699091558.

Adding to 80213501 its reverse (10531208), we get a palindrome (90744709).

The spelling of 80213501 in words is "eighty million, two hundred thirteen thousand, five hundred one".