521432542 has 16 divisors (see below), whose sum is σ = 826923600. Its totient is φ = 245911680.

The previous prime is 521432537. The next prime is 521432543. The reversal of 521432542 is 245234125.

It is a self number, because there is not a number n which added to its sum of digits gives 521432542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521432543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21259 + ... + 38662.

It is an arithmetic number, because the mean of its divisors is an integer number (51682725).

Almost surely, 2^521432542 is an apocalyptic number.

521432542 is a deficient number, since it is larger than the sum of its proper divisors (305491058).

521432542 is a wasteful number, since it uses less digits than its factorization.

521432542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60171.

The product of its digits is 9600, while the sum is 28.

The square root of 521432542 is about 22834.8974598092. The cubic root of 521432542 is about 804.8829180440.

Adding to 521432542 its reverse (245234125), we get a palindrome (766666667).

The spelling of 521432542 in words is "five hundred twenty-one million, four hundred thirty-two thousand, five hundred forty-two".