155524225 has 12 divisors (see below), whose sum is σ = 193855276. Its totient is φ = 123770880.

The previous prime is 155524223. The next prime is 155524277. The reversal of 155524225 is 522425551.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3717184 + 151807041 = 1928^2 + 12321^2 .

It is not a de Polignac number, because 155524225 - 2¹ = 155524223 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155524223) 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, 11292 + ... + 20941.

Almost surely, 2^155524225 is an apocalyptic number.

It is an amenable number.

155524225 is a deficient number, since it is larger than the sum of its proper divisors (38331051).

155524225 is a wasteful number, since it uses less digits than its factorization.

155524225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32436 (or 32431 counting only the distinct ones).

The product of its digits is 20000, while the sum is 31.

The square root of 155524225 is about 12470.9352095182. The cubic root of 155524225 is about 537.7734393820.

Adding to 155524225 its reverse (522425551), we get a palindrome (677949776).

The spelling of 155524225 in words is "one hundred fifty-five million, five hundred twenty-four thousand, two hundred twenty-five".