154223225 has 12 divisors (see below), whose sum is σ = 205947756. Its totient is φ = 113887680.

The previous prime is 154223221. The next prime is 154223243. The reversal of 154223225 is 522322451.

It can be written as a sum of positive squares in 6 ways, for example, as 1132096 + 153091129 = 1064^2 + 12373^2 .

It is not a de Polignac number, because 154223225 - 2² = 154223221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 154223194 and 154223203.

It is not an unprimeable number, because it can be changed into a prime (154223221) 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, 236942 + ... + 237591.

It is an arithmetic number, because the mean of its divisors is an integer number (17162313).

Almost surely, 2^154223225 is an apocalyptic number.

It is an amenable number.

154223225 is a deficient number, since it is larger than the sum of its proper divisors (51724531).

154223225 is a wasteful number, since it uses less digits than its factorization.

154223225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474556 (or 474551 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 154223225 is about 12418.6643806812. The cubic root of 154223225 is about 536.2697009550.

Adding to 154223225 its reverse (522322451), we get a palindrome (676545676).

The spelling of 154223225 in words is "one hundred fifty-four million, two hundred twenty-three thousand, two hundred twenty-five".