525312905 has 8 divisors (see below), whose sum is σ = 678865992. Its totient is φ = 387923328.

The previous prime is 525312901. The next prime is 525312913. The reversal of 525312905 is 509213525.

It can be written as a sum of positive squares in 4 ways, for example, as 2550409 + 522762496 = 1597^2 + 22864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 525312905 - 2² = 525312901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (525312901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040804 + ... + 4040933.

It is an arithmetic number, because the mean of its divisors is an integer number (84858249).

Almost surely, 2^525312905 is an apocalyptic number.

It is an amenable number.

525312905 is a deficient number, since it is larger than the sum of its proper divisors (153553087).

525312905 is a wasteful number, since it uses less digits than its factorization.

525312905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081755.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 525312905 is about 22919.7056045666. The cubic root of 525312905 is about 806.8745609885.

The spelling of 525312905 in words is "five hundred twenty-five million, three hundred twelve thousand, nine hundred five".