16230522221 has 2 divisors, whose sum is σ = 16230522222. Its totient is φ = 16230522220.

The previous prime is 16230522179. The next prime is 16230522227. The reversal of 16230522221 is 12222503261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13176744100 + 3053778121 = 114790^2 + 55261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16230522221 is a prime.

It is a super-3 number, since 3×16230522221³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16230522227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115261110 + 8115261111.

It is an arithmetic number, because the mean of its divisors is an integer number (8115261111).

Almost surely, 2^16230522221 is an apocalyptic number.

It is an amenable number.

16230522221 is a deficient number, since it is larger than the sum of its proper divisors (1).

16230522221 is an equidigital number, since it uses as much as digits as its factorization.

16230522221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 16230522221 in words is "sixteen billion, two hundred thirty million, five hundred twenty-two thousand, two hundred twenty-one".