525951581 has 2 divisors, whose sum is σ = 525951582. Its totient is φ = 525951580.

The previous prime is 525951553. The next prime is 525951623. The reversal of 525951581 is 185159525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464014681 + 61936900 = 21541^2 + 7870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525951581 is a prime.

It is a super-2 number, since 2×525951581² = 553250131112799122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525951551) 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 as a sum of consecutive naturals, namely, 262975790 + 262975791.

It is an arithmetic number, because the mean of its divisors is an integer number (262975791).

Almost surely, 2^525951581 is an apocalyptic number.

It is an amenable number.

525951581 is a deficient number, since it is larger than the sum of its proper divisors (1).

525951581 is an equidigital number, since it uses as much as digits as its factorization.

525951581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 41.

The square root of 525951581 is about 22933.6342737038. The cubic root of 525951581 is about 807.2014282114.

The spelling of 525951581 in words is "five hundred twenty-five million, nine hundred fifty-one thousand, five hundred eighty-one".