525865531 has 4 divisors (see below), whose sum is σ = 527121000. Its totient is φ = 524610064.

The previous prime is 525865499. The next prime is 525865541. The reversal of 525865531 is 135568525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 525865531 - 2⁵ = 525865499 is a prime.

It is a super-2 number, since 2×525865531² = 553069113387823922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525865541) 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, 627106 + ... + 627943.

It is an arithmetic number, because the mean of its divisors is an integer number (131780250).

Almost surely, 2^525865531 is an apocalyptic number.

525865531 is a deficient number, since it is larger than the sum of its proper divisors (1255469).

525865531 is a wasteful number, since it uses less digits than its factorization.

525865531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255468.

The product of its digits is 180000, while the sum is 40.

The square root of 525865531 is about 22931.7581314648. The cubic root of 525865531 is about 807.1574042152.

The spelling of 525865531 in words is "five hundred twenty-five million, eight hundred sixty-five thousand, five hundred thirty-one".