525440581 has 8 divisors (see below), whose sum is σ = 527484384. Its totient is φ = 523401840.

The previous prime is 525440579. The next prime is 525440623. The reversal of 525440581 is 185044525.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525440581 - 2¹ = 525440579 is a prime.

It is a super-2 number, since 2×525440581² = 552175608323235122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525440501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448126 + ... + 449296.

It is an arithmetic number, because the mean of its divisors is an integer number (65935548).

Almost surely, 2^525440581 is an apocalyptic number.

It is an amenable number.

525440581 is a deficient number, since it is larger than the sum of its proper divisors (2043803).

525440581 is a wasteful number, since it uses less digits than its factorization.

525440581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531.

The product of its (nonzero) digits is 32000, while the sum is 34.

The square root of 525440581 is about 22922.4907241774. The cubic root of 525440581 is about 806.9399253142.

The spelling of 525440581 in words is "five hundred twenty-five million, four hundred forty thousand, five hundred eighty-one".