525134409 has 16 divisors (see below), whose sum is σ = 719646720. Its totient is φ = 340488720.

The previous prime is 525134387. The next prime is 525134473. The reversal of 525134409 is 904431525.

It is not a de Polignac number, because 525134409 - 2⁸ = 525134153 is a prime.

It is a super-2 number, since 2×525134409² = 551532295031558562, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 525134409.

It is not an unprimeable number, because it can be changed into a prime (525134809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657 + ... + 32414.

It is an arithmetic number, because the mean of its divisors is an integer number (44977920).

Almost surely, 2^525134409 is an apocalyptic number.

It is an amenable number.

525134409 is a deficient number, since it is larger than the sum of its proper divisors (194512311).

525134409 is a wasteful number, since it uses less digits than its factorization.

525134409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33220.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 525134409 is about 22915.8113319167. The cubic root of 525134409 is about 806.7831613700.

The spelling of 525134409 in words is "five hundred twenty-five million, one hundred thirty-four thousand, four hundred nine".