581225666522213 has 2 divisors, whose sum is σ = 581225666522214. Its totient is φ = 581225666522212.

The previous prime is 581225666522183. The next prime is 581225666522251. The reversal of 581225666522213 is 312225666522185.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 528601117220929 + 52624549301284 = 22991327^2 + 7254278^2 .

It is a cyclic number.

It is not a de Polignac number, because 581225666522213 - 2²² = 581225662327909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581225666527213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290612833261106 + 290612833261107.

It is an arithmetic number, because the mean of its divisors is an integer number (290612833261107).

Almost surely, 2^{581225666522213} is an apocalyptic number.

It is an amenable number.

581225666522213 is a deficient number, since it is larger than the sum of its proper divisors (1).

581225666522213 is an equidigital number, since it uses as much as digits as its factorization.

581225666522213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736000, while the sum is 56.

The spelling of 581225666522213 in words is "five hundred eighty-one trillion, two hundred twenty-five billion, six hundred sixty-six million, five hundred twenty-two thousand, two hundred thirteen".