525145505 has 4 divisors (see below), whose sum is σ = 630174612. Its totient is φ = 420116400.

The previous prime is 525145501. The next prime is 525145619. The reversal of 525145505 is 505541525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198584464 + 326561041 = 14092^2 + 18071^2 .

It is not a de Polignac number, because 525145505 - 2² = 525145501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525145501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52514546 + ... + 52514555.

It is an arithmetic number, because the mean of its divisors is an integer number (157543653).

Almost surely, 2^525145505 is an apocalyptic number.

It is an amenable number.

525145505 is a deficient number, since it is larger than the sum of its proper divisors (105029107).

525145505 is a wasteful number, since it uses less digits than its factorization.

525145505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105029106.

The product of its (nonzero) digits is 25000, while the sum is 32.

The square root of 525145505 is about 22916.0534342194. The cubic root of 525145505 is about 806.7888437266.

The spelling of 525145505 in words is "five hundred twenty-five million, one hundred forty-five thousand, five hundred five".