155101225 has 12 divisors (see below), whose sum is σ = 197524684. Its totient is φ = 120726720.

The previous prime is 155101171. The next prime is 155101229. The reversal of 155101225 is 522101551.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1142761 + 153958464 = 1069^2 + 12408^2 .

It is not a de Polignac number, because 155101225 - 2⁷ = 155101097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155101196 and 155101205.

It is not an unprimeable number, because it can be changed into a prime (155101229) 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 in 11 ways as a sum of consecutive naturals, for example, 82914 + ... + 84763.

Almost surely, 2^155101225 is an apocalyptic number.

It is an amenable number.

155101225 is a deficient number, since it is larger than the sum of its proper divisors (42423459).

155101225 is a wasteful number, since it uses less digits than its factorization.

155101225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167724 (or 167719 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 155101225 is about 12453.9642283090. The cubic root of 155101225 is about 537.2854452849.

Adding to 155101225 its reverse (522101551), we get a palindrome (677202776).

The spelling of 155101225 in words is "one hundred fifty-five million, one hundred one thousand, two hundred twenty-five".