525306505 has 4 divisors (see below), whose sum is σ = 630367812. Its totient is φ = 420245200.

The previous prime is 525306497. The next prime is 525306557. The reversal of 525306505 is 505603525.

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 292957456 + 232349049 = 17116^2 + 15243^2 .

It is not a de Polignac number, because 525306505 - 2³ = 525306497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52530646 + ... + 52530655.

It is an arithmetic number, because the mean of its divisors is an integer number (157591953).

Almost surely, 2^525306505 is an apocalyptic number.

It is an amenable number.

525306505 is a deficient number, since it is larger than the sum of its proper divisors (105061307).

525306505 is a wasteful number, since it uses less digits than its factorization.

525306505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105061306.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 525306505 is about 22919.5659862921. The cubic root of 525306505 is about 806.8712841998.

The spelling of 525306505 in words is "five hundred twenty-five million, three hundred six thousand, five hundred five".