385617003221 has 2 divisors, whose sum is σ = 385617003222. Its totient is φ = 385617003220.

The previous prime is 385617003197. The next prime is 385617003241. The reversal of 385617003221 is 122300716583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279826188196 + 105790815025 = 528986^2 + 325255^2 .

It is a cyclic number.

It is not a de Polignac number, because 385617003221 - 2¹⁸ = 385616741077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385617003241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192808501610 + 192808501611.

It is an arithmetic number, because the mean of its divisors is an integer number (192808501611).

Almost surely, 2^385617003221 is an apocalyptic number.

It is an amenable number.

385617003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

385617003221 is an equidigital number, since it uses as much as digits as its factorization.

385617003221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 385617003221 in words is "three hundred eighty-five billion, six hundred seventeen million, three thousand, two hundred twenty-one".