213430445321 has 2 divisors, whose sum is σ = 213430445322. Its totient is φ = 213430445320.

The previous prime is 213430445279. The next prime is 213430445357. The reversal of 213430445321 is 123544034312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189346819600 + 24083625721 = 435140^2 + 155189^2 .

It is a cyclic number.

It is not a de Polignac number, because 213430445321 - 2⁶ = 213430445257 is a prime.

It is not a weakly prime, because it can be changed into another prime (213430445021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106715222660 + 106715222661.

It is an arithmetic number, because the mean of its divisors is an integer number (106715222661).

Almost surely, 2^213430445321 is an apocalyptic number.

It is an amenable number.

213430445321 is a deficient number, since it is larger than the sum of its proper divisors (1).

213430445321 is an equidigital number, since it uses as much as digits as its factorization.

213430445321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 213430445321 its reverse (123544034312), we get a palindrome (336974479633).

The spelling of 213430445321 in words is "two hundred thirteen billion, four hundred thirty million, four hundred forty-five thousand, three hundred twenty-one".