145520227 has 2 divisors, whose sum is σ = 145520228. Its totient is φ = 145520226.

The previous prime is 145520209. The next prime is 145520239. The reversal of 145520227 is 722025541.

145520227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145520227 - 2⁷ = 145520099 is a prime.

It is a super-2 number, since 2×145520227² = 42352272932263058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145520195 and 145520204.

It is not a weakly prime, because it can be changed into another prime (145520257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72760113 + 72760114.

It is an arithmetic number, because the mean of its divisors is an integer number (72760114).

Almost surely, 2^145520227 is an apocalyptic number.

145520227 is a deficient number, since it is larger than the sum of its proper divisors (1).

145520227 is an equidigital number, since it uses as much as digits as its factorization.

145520227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 145520227 is about 12063.1764888026. The cubic root of 145520227 is about 525.9863266118.

Adding to 145520227 its reverse (722025541), we get a palindrome (867545768).

The spelling of 145520227 in words is "one hundred forty-five million, five hundred twenty thousand, two hundred twenty-seven".