851305201 has 2 divisors, whose sum is σ = 851305202. Its totient is φ = 851305200.

The previous prime is 851305199. The next prime is 851305249. The reversal of 851305201 is 102503158.

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., 493906176 + 357399025 = 22224^2 + 18905^2 .

It is a cyclic number.

It is not a de Polignac number, because 851305201 - 2¹ = 851305199 is a prime.

Together with 851305199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (851305261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425652600 + 425652601.

It is an arithmetic number, because the mean of its divisors is an integer number (425652601).

Almost surely, 2^851305201 is an apocalyptic number.

It is an amenable number.

851305201 is a deficient number, since it is larger than the sum of its proper divisors (1).

851305201 is an equidigital number, since it uses as much as digits as its factorization.

851305201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 851305201 is about 29177.1349004662. The cubic root of 851305201 is about 947.7528423463.

Adding to 851305201 its reverse (102503158), we get a palindrome (953808359).

The spelling of 851305201 in words is "eight hundred fifty-one million, three hundred five thousand, two hundred one".