145222267 has 4 divisors (see below), whose sum is σ = 145618336. Its totient is φ = 144826200.

The previous prime is 145222249. The next prime is 145222291. The reversal of 145222267 is 762222541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145222267 - 2⁷ = 145222139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145222237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197484 + ... + 198217.

It is an arithmetic number, because the mean of its divisors is an integer number (36404584).

Almost surely, 2^145222267 is an apocalyptic number.

145222267 is a deficient number, since it is larger than the sum of its proper divisors (396069).

145222267 is an equidigital number, since it uses as much as digits as its factorization.

145222267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396068.

The product of its digits is 13440, while the sum is 31.

The square root of 145222267 is about 12050.8201795562. The cubic root of 145222267 is about 525.6270868073.

The spelling of 145222267 in words is "one hundred forty-five million, two hundred twenty-two thousand, two hundred sixty-seven".