525520111 has 4 divisors (see below), whose sum is σ = 530622352. Its totient is φ = 520417872.

The previous prime is 525520103. The next prime is 525520117. The reversal of 525520111 is 111025525.

It is a happy number.

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 525520111 - 2³ = 525520103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525520117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550966 + ... + 2551171.

It is an arithmetic number, because the mean of its divisors is an integer number (132655588).

Almost surely, 2^525520111 is an apocalyptic number.

525520111 is a deficient number, since it is larger than the sum of its proper divisors (5102241).

525520111 is a wasteful number, since it uses less digits than its factorization.

525520111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102240.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 525520111 is about 22924.2254176668. The cubic root of 525520111 is about 806.9806357180.

Adding to 525520111 its reverse (111025525), we get a palindrome (636545636).

The spelling of 525520111 in words is "five hundred twenty-five million, five hundred twenty thousand, one hundred eleven".