155225 has 12 divisors (see below), whose sum is σ = 220224. Its totient is φ = 106320.

The previous prime is 155219. The next prime is 155231. The reversal of 155225 is 522551.

It is an interprime number because it is at equal distance from previous prime (155219) and next prime (155231).

It is not a de Polignac number, because 155225 - 2⁴ = 155209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155197 and 155206.

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, 269 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (18352).

2¹⁵⁵²²⁵ is an apocalyptic number.

It is an amenable number.

155225 is a deficient number, since it is larger than the sum of its proper divisors (64999).

155225 is an equidigital number, since it uses as much as digits as its factorization.

155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 899 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 155225 is about 393.9860403618. The cubic root of 155225 is about 53.7428330087.

Adding to 155225 its reverse (522551), we get a palindrome (677776).

The spelling of 155225 in words is "one hundred fifty-five thousand, two hundred twenty-five".