4257559269221 has 2 divisors, whose sum is σ = 4257559269222. Its totient is φ = 4257559269220.

The previous prime is 4257559269217. The next prime is 4257559269307. The reversal of 4257559269221 is 1229629557524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4243657680196 + 13901589025 = 2060014^2 + 117905^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257559269221 - 2² = 4257559269217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4257559269211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128779634610 + 2128779634611.

It is an arithmetic number, because the mean of its divisors is an integer number (2128779634611).

Almost surely, 2^{4257559269221} is an apocalyptic number.

It is an amenable number.

4257559269221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4257559269221 is an equidigital number, since it uses as much as digits as its factorization.

4257559269221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 59.

The spelling of 4257559269221 in words is "four trillion, two hundred fifty-seven billion, five hundred fifty-nine million, two hundred sixty-nine thousand, two hundred twenty-one".