145222225 has 24 divisors (see below), whose sum is σ = 194699840. Its totient is φ = 107075520.

The previous prime is 145222201. The next prime is 145222237. The reversal of 145222225 is 522222541.

145222225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145222225 - 2⁷ = 145222097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 145222225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13444 + ... + 21706.

Almost surely, 2^145222225 is an apocalyptic number.

It is an amenable number.

145222225 is a deficient number, since it is larger than the sum of its proper divisors (49477615).

145222225 is a wasteful number, since it uses less digits than its factorization.

145222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8329 (or 8324 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 145222225 is about 12050.8184369361. The cubic root of 145222225 is about 525.6270361347.

Adding to 145222225 its reverse (522222541), we get a palindrome (667444766).

The spelling of 145222225 in words is "one hundred forty-five million, two hundred twenty-two thousand, two hundred twenty-five".