155525 has 6 divisors (see below), whose sum is σ = 192882. Its totient is φ = 124400.

The previous prime is 155521. The next prime is 155537. The reversal of 155525 is 525551.

It can be written as a sum of positive squares in 3 ways, for example, as 289 + 155236 = 17^2 + 394^2 .

It is not a de Polignac number, because 155525 - 2² = 155521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086 + ... + 3135.

It is an arithmetic number, because the mean of its divisors is an integer number (32147).

2¹⁵⁵⁵²⁵ is an apocalyptic number.

It is an amenable number.

155525 is a deficient number, since it is larger than the sum of its proper divisors (37357).

155525 is an equidigital number, since it uses as much as digits as its factorization.

155525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6231 (or 6226 counting only the distinct ones).

The product of its digits is 1250, while the sum is 23.

The square root of 155525 is about 394.3665807342. The cubic root of 155525 is about 53.7774332648. Note that the first 3 decimals are identical.

The spelling of 155525 in words is "one hundred fifty-five thousand, five hundred twenty-five".