346230656221 has 2 divisors, whose sum is σ = 346230656222. Its totient is φ = 346230656220.

The previous prime is 346230656201. The next prime is 346230656231. The reversal of 346230656221 is 122656032643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338158532196 + 8072124025 = 581514^2 + 89845^2 .

It is a cyclic number.

It is not a de Polignac number, because 346230656221 - 2²¹ = 346228559069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346230656201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173115328110 + 173115328111.

It is an arithmetic number, because the mean of its divisors is an integer number (173115328111).

Almost surely, 2^346230656221 is an apocalyptic number.

It is an amenable number.

346230656221 is a deficient number, since it is larger than the sum of its proper divisors (1).

346230656221 is an equidigital number, since it uses as much as digits as its factorization.

346230656221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 346230656221 its reverse (122656032643), we get a palindrome (468886688864).

The spelling of 346230656221 in words is "three hundred forty-six billion, two hundred thirty million, six hundred fifty-six thousand, two hundred twenty-one".