155144225 has 12 divisors (see below), whose sum is σ = 194365164. Its totient is φ = 122833920.

The previous prime is 155144203. The next prime is 155144233. The reversal of 155144225 is 522441551.

It can be written as a sum of positive squares in 6 ways, for example, as 3139984 + 152004241 = 1772^2 + 12329^2 .

It is not a de Polignac number, because 155144225 - 2¹⁰ = 155143201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29564 + ... + 34413.

It is an arithmetic number, because the mean of its divisors is an integer number (16197097).

Almost surely, 2^155144225 is an apocalyptic number.

It is an amenable number.

155144225 is a deficient number, since it is larger than the sum of its proper divisors (39220939).

155144225 is an equidigital number, since it uses as much as digits as its factorization.

155144225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64084 (or 64079 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 155144225 is about 12455.6904666100. The cubic root of 155144225 is about 537.3350927316.

Adding to 155144225 its reverse (522441551), we get a palindrome (677585776).

The spelling of 155144225 in words is "one hundred fifty-five million, one hundred forty-four thousand, two hundred twenty-five".