525887581 has 2 divisors, whose sum is σ = 525887582. Its totient is φ = 525887580.

The previous prime is 525887573. The next prime is 525887597. The reversal of 525887581 is 185788525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497691481 + 28196100 = 22309^2 + 5310^2 .

It is a cyclic number.

It is not a de Polignac number, because 525887581 - 2³ = 525887573 is a prime.

It is a super-2 number, since 2×525887581² = 553115495700063122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525887521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262943790 + 262943791.

It is an arithmetic number, because the mean of its divisors is an integer number (262943791).

Almost surely, 2^525887581 is an apocalyptic number.

It is an amenable number.

525887581 is a deficient number, since it is larger than the sum of its proper divisors (1).

525887581 is an equidigital number, since it uses as much as digits as its factorization.

525887581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896000, while the sum is 49.

The square root of 525887581 is about 22932.2389007266. The cubic root of 525887581 is about 807.1686856620.

The spelling of 525887581 in words is "five hundred twenty-five million, eight hundred eighty-seven thousand, five hundred eighty-one".