521432703 has 12 divisors (see below), whose sum is σ = 821651688. Its totient is φ = 316019760.

The previous prime is 521432693. The next prime is 521432719. The reversal of 521432703 is 307234125.

It is not a de Polignac number, because 521432703 - 2¹⁶ = 521367167 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521432773) 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 11 ways as a sum of consecutive naturals, for example, 2633400 + ... + 2633597.

It is an arithmetic number, because the mean of its divisors is an integer number (68470974).

Almost surely, 2^521432703 is an apocalyptic number.

521432703 is a deficient number, since it is larger than the sum of its proper divisors (300218985).

521432703 is a wasteful number, since it uses less digits than its factorization.

521432703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267014 (or 5267011 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 521432703 is about 22834.9009851149. The cubic root of 521432703 is about 804.8830008838.

Adding to 521432703 its reverse (307234125), we get a palindrome (828666828).

The spelling of 521432703 in words is "five hundred twenty-one million, four hundred thirty-two thousand, seven hundred three".