10255457221 has 2 divisors, whose sum is σ = 10255457222. Its totient is φ = 10255457220.

The previous prime is 10255457197. The next prime is 10255457227. The reversal of 10255457221 is 12275455201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9954052900 + 301404321 = 99770^2 + 17361^2 .

It is a cyclic number.

It is not a de Polignac number, because 10255457221 - 2⁹ = 10255456709 is a prime.

It is a super-2 number, since 2×10255457221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10255457227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5127728610 + 5127728611.

It is an arithmetic number, because the mean of its divisors is an integer number (5127728611).

Almost surely, 2^10255457221 is an apocalyptic number.

It is an amenable number.

10255457221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10255457221 is an equidigital number, since it uses as much as digits as its factorization.

10255457221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28000, while the sum is 34.

The spelling of 10255457221 in words is "ten billion, two hundred fifty-five million, four hundred fifty-seven thousand, two hundred twenty-one".