221430232013 has 2 divisors, whose sum is σ = 221430232014. Its totient is φ = 221430232012.

The previous prime is 221430232007. The next prime is 221430232027. The reversal of 221430232013 is 310232034122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159478026409 + 61952205604 = 399347^2 + 248902^2 .

It is a cyclic number.

It is not a de Polignac number, because 221430232013 - 2²⁴ = 221413454797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221430232013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221430232033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715116006 + 110715116007.

It is an arithmetic number, because the mean of its divisors is an integer number (110715116007).

Almost surely, 2^221430232013 is an apocalyptic number.

It is an amenable number.

221430232013 is a deficient number, since it is larger than the sum of its proper divisors (1).

221430232013 is an equidigital number, since it uses as much as digits as its factorization.

221430232013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221430232013 its reverse (310232034122), we get a palindrome (531662266135).

The spelling of 221430232013 in words is "two hundred twenty-one billion, four hundred thirty million, two hundred thirty-two thousand, thirteen".