145867222 has 4 divisors (see below), whose sum is σ = 218800836. Its totient is φ = 72933610.

The previous prime is 145867201. The next prime is 145867229. The reversal of 145867222 is 222768541.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145867229) by changing a digit.

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 as a sum of consecutive naturals, namely, 36466804 + ... + 36466807.

It is an arithmetic number, because the mean of its divisors is an integer number (54700209).

Almost surely, 2^145867222 is an apocalyptic number.

145867222 is a deficient number, since it is larger than the sum of its proper divisors (72933614).

145867222 is an equidigital number, since it uses as much as digits as its factorization.

145867222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72933613.

The product of its digits is 53760, while the sum is 37.

The square root of 145867222 is about 12077.5503310895. The cubic root of 145867222 is about 526.4040686479.

The spelling of 145867222 in words is "one hundred forty-five million, eight hundred sixty-seven thousand, two hundred twenty-two".