10307256221 has 2 divisors, whose sum is σ = 10307256222. Its totient is φ = 10307256220.

The previous prime is 10307256217. The next prime is 10307256259. The reversal of 10307256221 is 12265270301.

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., 7604712025 + 2702544196 = 87205^2 + 51986^2 .

It is an emirp because it is prime and its reverse (12265270301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10307256221 - 2² = 10307256217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10307256521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153628110 + 5153628111.

It is an arithmetic number, because the mean of its divisors is an integer number (5153628111).

Almost surely, 2^10307256221 is an apocalyptic number.

It is an amenable number.

10307256221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10307256221 is an equidigital number, since it uses as much as digits as its factorization.

10307256221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 10307256221 in words is "ten billion, three hundred seven million, two hundred fifty-six thousand, two hundred twenty-one".