30230220173 has 2 divisors, whose sum is σ = 30230220174. Its totient is φ = 30230220172.

The previous prime is 30230220157. The next prime is 30230220191. The reversal of 30230220173 is 37102203203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27364438084 + 2865782089 = 165422^2 + 53533^2 .

It is a cyclic number.

It is not a de Polignac number, because 30230220173 - 2⁴ = 30230220157 is a prime.

It is a super-2 number, since 2×30230220173² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30230220113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115110086 + 15115110087.

It is an arithmetic number, because the mean of its divisors is an integer number (15115110087).

Almost surely, 2^30230220173 is an apocalyptic number.

It is an amenable number.

30230220173 is a deficient number, since it is larger than the sum of its proper divisors (1).

30230220173 is an equidigital number, since it uses as much as digits as its factorization.

30230220173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 23.

Adding to 30230220173 its reverse (37102203203), we get a palindrome (67332423376).

The spelling of 30230220173 in words is "thirty billion, two hundred thirty million, two hundred twenty thousand, one hundred seventy-three".