155234225 has 12 divisors (see below), whose sum is σ = 203813964. Its totient is φ = 116881920.

The previous prime is 155234207. The next prime is 155234239. The reversal of 155234225 is 522432551.

It can be written as a sum of positive squares in 6 ways, for example, as 19651489 + 135582736 = 4433^2 + 11644^2 .

It is not a de Polignac number, because 155234225 - 2²⁰ = 154185649 is a prime.

It is a super-2 number, since 2×155234225² = 48195329222701250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 182204 + ... + 183053.

It is an arithmetic number, because the mean of its divisors is an integer number (16984497).

Almost surely, 2^155234225 is an apocalyptic number.

It is an amenable number.

155234225 is a deficient number, since it is larger than the sum of its proper divisors (48579739).

155234225 is a wasteful number, since it uses less digits than its factorization.

155234225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365284 (or 365279 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 155234225 is about 12459.3027493516. The cubic root of 155234225 is about 537.4389763063.

Adding to 155234225 its reverse (522432551), we get a palindrome (677666776).

The spelling of 155234225 in words is "one hundred fifty-five million, two hundred thirty-four thousand, two hundred twenty-five".