525721313 has 12 divisors (see below), whose sum is σ = 574330860. Its totient is φ = 480969216.

The previous prime is 525721307. The next prime is 525721333. The reversal of 525721313 is 313127525.

It can be written as a sum of positive squares in 6 ways, for example, as 266897569 + 258823744 = 16337^2 + 16088^2 .

It is not a de Polignac number, because 525721313 - 2⁴ = 525721297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525721333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5333 + ... + 32861.

It is an arithmetic number, because the mean of its divisors is an integer number (47860905).

Almost surely, 2^525721313 is an apocalyptic number.

It is an amenable number.

525721313 is a deficient number, since it is larger than the sum of its proper divisors (48609547).

525721313 is a wasteful number, since it uses less digits than its factorization.

525721313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27668 (or 27655 counting only the distinct ones).

The product of its digits is 6300, while the sum is 29.

The square root of 525721313 is about 22928.6134120666. The cubic root of 525721313 is about 807.0836101476.

Adding to 525721313 its reverse (313127525), we get a palindrome (838848838).

The spelling of 525721313 in words is "five hundred twenty-five million, seven hundred twenty-one thousand, three hundred thirteen".