525399830 has 16 divisors (see below), whose sum is σ = 968786784. Its totient is φ = 205033920.

The previous prime is 525399827. The next prime is 525399839. The reversal of 525399830 is 38993525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525399839) 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 7 ways as a sum of consecutive naturals, for example, 640322 + ... + 641141.

It is an arithmetic number, because the mean of its divisors is an integer number (60549174).

Almost surely, 2^525399830 is an apocalyptic number.

525399830 is a deficient number, since it is larger than the sum of its proper divisors (443386954).

525399830 is a wasteful number, since it uses less digits than its factorization.

525399830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281511.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 525399830 is about 22921.6018201172. The cubic root of 525399830 is about 806.9190637996.

The spelling of 525399830 in words is "five hundred twenty-five million, three hundred ninety-nine thousand, eight hundred thirty".