6145236221 has 2 divisors, whose sum is σ = 6145236222. Its totient is φ = 6145236220.

The previous prime is 6145236193. The next prime is 6145236239. The reversal of 6145236221 is 1226325416.

6145236221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6129324100 + 15912121 = 78290^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 6145236221 - 2⁶ = 6145236157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6145236521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3072618110 + 3072618111.

It is an arithmetic number, because the mean of its divisors is an integer number (3072618111).

Almost surely, 2^6145236221 is an apocalyptic number.

It is an amenable number.

6145236221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6145236221 is an equidigital number, since it uses as much as digits as its factorization.

6145236221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 6145236221 is about 78391.5570772771. The cubic root of 6145236221 is about 1831.6656201066.

The spelling of 6145236221 in words is "six billion, one hundred forty-five million, two hundred thirty-six thousand, two hundred twenty-one".