145222212 has 24 divisors (see below), whose sum is σ = 344408512. Its totient is φ = 47613600.

The previous prime is 145222201. The next prime is 145222237. The reversal of 145222212 is 212222541.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98464 + ... + 99927.

Almost surely, 2^145222212 is an apocalyptic number.

145222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145222212 is an abundant number, since it is smaller than the sum of its proper divisors (199186300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145222212 is a wasteful number, since it uses less digits than its factorization.

145222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198459 (or 198457 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 145222212 is about 12050.8178975537. The cubic root of 145222212 is about 525.6270204504.

Adding to 145222212 its reverse (212222541), we get a palindrome (357444753).

The spelling of 145222212 in words is "one hundred forty-five million, two hundred twenty-two thousand, two hundred twelve".