525581513 has 4 divisors (see below), whose sum is σ = 525879060. Its totient is φ = 525283968.

The previous prime is 525581491. The next prime is 525581527. The reversal of 525581513 is 315185525.

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 107910544 + 417670969 = 10388^2 + 20437^2 .

It is a cyclic number.

It is not a de Polignac number, because 525581513 - 2¹² = 525577417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525581543) 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, 146108 + ... + 149661.

It is an arithmetic number, because the mean of its divisors is an integer number (131469765).

Almost surely, 2^525581513 is an apocalyptic number.

It is an amenable number.

525581513 is a deficient number, since it is larger than the sum of its proper divisors (297547).

525581513 is a wasteful number, since it uses less digits than its factorization.

525581513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297546.

The product of its digits is 30000, while the sum is 35.

The square root of 525581513 is about 22925.5646168202. The cubic root of 525581513 is about 807.0120638177.

It can be divided in two parts, 5255 and 81513, that added together give a palindrome (86768).

The spelling of 525581513 in words is "five hundred twenty-five million, five hundred eighty-one thousand, five hundred thirteen".