155005525 has 6 divisors (see below), whose sum is σ = 192206882. Its totient is φ = 124004400.

The previous prime is 155005523. The next prime is 155005531. The reversal of 155005525 is 525500551.

It is a happy number.

155005525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 55145476 + 99860049 = 7426^2 + 9993^2 .

It is not a de Polignac number, because 155005525 - 2¹ = 155005523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155005493 and 155005502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155005523) 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, 3100086 + ... + 3100135.

Almost surely, 2^155005525 is an apocalyptic number.

It is an amenable number.

155005525 is a deficient number, since it is larger than the sum of its proper divisors (37201357).

155005525 is an equidigital number, since it uses as much as digits as its factorization.

155005525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200231 (or 6200226 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 155005525 is about 12450.1214853511. The cubic root of 155005525 is about 537.1749179050.

It can be divided in two parts, 15500 and 5525, that added together give a square (21025 = 145²).

The spelling of 155005525 in words is "one hundred fifty-five million, five thousand, five hundred twenty-five".