145820227 has 12 divisors (see below), whose sum is σ = 170133600. Its totient is φ = 124616016.

The previous prime is 145820209. The next prime is 145820239. The reversal of 145820227 is 722028541.

It is a happy number.

It is not a de Polignac number, because 145820227 - 2⁷ = 145820099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145820627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12838 + ... + 21364.

It is an arithmetic number, because the mean of its divisors is an integer number (14177800).

Almost surely, 2^145820227 is an apocalyptic number.

145820227 is a deficient number, since it is larger than the sum of its proper divisors (24313373).

145820227 is an equidigital number, since it uses as much as digits as its factorization.

145820227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890 (or 8883 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 145820227 is about 12075.6046225438. The cubic root of 145820227 is about 526.3475308915.

Adding to 145820227 its reverse (722028541), we get a palindrome (867848768).

The spelling of 145820227 in words is "one hundred forty-five million, eight hundred twenty thousand, two hundred twenty-seven".