525442403 has 4 divisors (see below), whose sum is σ = 526539840. Its totient is φ = 524344968.

The previous prime is 525442381. The next prime is 525442433. The reversal of 525442403 is 304244525.

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 525442403 - 2¹⁰ = 525441379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525442433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548000 + ... + 548957.

It is an arithmetic number, because the mean of its divisors is an integer number (131634960).

Almost surely, 2^525442403 is an apocalyptic number.

525442403 is a deficient number, since it is larger than the sum of its proper divisors (1097437).

525442403 is a wasteful number, since it uses less digits than its factorization.

525442403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097436.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 525442403 is about 22922.5304667700. The cubic root of 525442403 is about 806.9408580190.

Adding to 525442403 its reverse (304244525), we get a palindrome (829686928).

The spelling of 525442403 in words is "five hundred twenty-five million, four hundred forty-two thousand, four hundred three".