80020261 has 2 divisors, whose sum is σ = 80020262. Its totient is φ = 80020260.

The previous prime is 80020253. The next prime is 80020319. The reversal of 80020261 is 16202008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 26071236 = 7345^2 + 5106^2 .

It is a cyclic number.

It is not a de Polignac number, because 80020261 - 2³ = 80020253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80020211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40010130 + 40010131.

It is an arithmetic number, because the mean of its divisors is an integer number (40010131).

Almost surely, 2^80020261 is an apocalyptic number.

It is an amenable number.

80020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

80020261 is an equidigital number, since it uses as much as digits as its factorization.

80020261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 80020261 is about 8945.4044626277. The cubic root of 80020261 is about 430.9233107703.

Adding to 80020261 its reverse (16202008), we get a palindrome (96222269).

The spelling of 80020261 in words is "eighty million, twenty thousand, two hundred sixty-one".