80232721 has 2 divisors, whose sum is σ = 80232722. Its totient is φ = 80232720.

The previous prime is 80232709. The next prime is 80232727. The reversal of 80232721 is 12723208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73342096 + 6890625 = 8564^2 + 2625^2 .

It is a cyclic number.

It is not a de Polignac number, because 80232721 - 2²¹ = 78135569 is a prime.

It is not a weakly prime, because it can be changed into another prime (80232727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40116360 + 40116361.

It is an arithmetic number, because the mean of its divisors is an integer number (40116361).

Almost surely, 2^80232721 is an apocalyptic number.

It is an amenable number.

80232721 is a deficient number, since it is larger than the sum of its proper divisors (1).

80232721 is an equidigital number, since it uses as much as digits as its factorization.

80232721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 80232721 is about 8957.2719619313. The cubic root of 80232721 is about 431.3043520097.

Adding to 80232721 its reverse (12723208), we get a palindrome (92955929).

The spelling of 80232721 in words is "eighty million, two hundred thirty-two thousand, seven hundred twenty-one".