155927225 has 12 divisors (see below), whose sum is σ = 195127020. Its totient is φ = 123595200.

The previous prime is 155927207. The next prime is 155927227. The reversal of 155927225 is 522729551.

It can be written as a sum of positive squares in 6 ways, for example, as 14531344 + 141395881 = 3812^2 + 11891^2 .

It is not a de Polignac number, because 155927225 - 2¹⁰ = 155926201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155927227) 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, 25886 + ... + 31335.

It is an arithmetic number, because the mean of its divisors is an integer number (16260585).

Almost surely, 2^155927225 is an apocalyptic number.

It is an amenable number.

155927225 is a deficient number, since it is larger than the sum of its proper divisors (39199795).

155927225 is a wasteful number, since it uses less digits than its factorization.

155927225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57340 (or 57335 counting only the distinct ones).

The product of its digits is 63000, while the sum is 38.

The square root of 155927225 is about 12487.0823253473. The cubic root of 155927225 is about 538.2375380819.

The spelling of 155927225 in words is "one hundred fifty-five million, nine hundred twenty-seven thousand, two hundred twenty-five".