81202301 has 2 divisors, whose sum is σ = 81202302. Its totient is φ = 81202300.

The previous prime is 81202243. The next prime is 81202321. The reversal of 81202301 is 10320218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 22201 = 9010^2 + 149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81202301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81202301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40601150 + 40601151.

It is an arithmetic number, because the mean of its divisors is an integer number (40601151).

Almost surely, 2^81202301 is an apocalyptic number.

It is an amenable number.

81202301 is a deficient number, since it is larger than the sum of its proper divisors (1).

81202301 is an equidigital number, since it uses as much as digits as its factorization.

81202301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 81202301 is about 9011.2319357566. The cubic root of 81202301 is about 433.0347796913.

Adding to 81202301 its reverse (10320218), we get a palindrome (91522519).

The spelling of 81202301 in words is "eighty-one million, two hundred two thousand, three hundred one".