525671581 has 2 divisors, whose sum is σ = 525671582. Its totient is φ = 525671580.

The previous prime is 525671579. The next prime is 525671611. The reversal of 525671581 is 185176525.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493284100 + 32387481 = 22210^2 + 5691^2 .

It is a cyclic number.

It is not a de Polignac number, because 525671581 - 2¹ = 525671579 is a prime.

It is a super-2 number, since 2×525671581² = 552661222142079122, which contains 22 as substring.

Together with 525671579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525671981) 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, 262835790 + 262835791.

It is an arithmetic number, because the mean of its divisors is an integer number (262835791).

Almost surely, 2^525671581 is an apocalyptic number.

It is an amenable number.

525671581 is a deficient number, since it is larger than the sum of its proper divisors (1).

525671581 is an equidigital number, since it uses as much as digits as its factorization.

525671581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 40.

The square root of 525671581 is about 22927.5288899611. The cubic root of 525671581 is about 807.0581599412.

The spelling of 525671581 in words is "five hundred twenty-five million, six hundred seventy-one thousand, five hundred eighty-one".