213524542 has 32 divisors (see below), whose sum is σ = 400308480. Its totient is φ = 82985280.

The previous prime is 213524513. The next prime is 213524551. The reversal of 213524542 is 245425312.

It is a self number, because there is not a number n which added to its sum of digits gives 213524542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70434 + ... + 73402.

It is an arithmetic number, because the mean of its divisors is an integer number (12509640).

Almost surely, 2^213524542 is an apocalyptic number.

213524542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213524542 is a deficient number, since it is larger than the sum of its proper divisors (186783938).

213524542 is a wasteful number, since it uses less digits than its factorization.

213524542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456.

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

The square root of 213524542 is about 14612.4789820208. The cubic root of 213524542 is about 597.6990969468.

Adding to 213524542 its reverse (245425312), we get a palindrome (458949854).

The spelling of 213524542 in words is "two hundred thirteen million, five hundred twenty-four thousand, five hundred forty-two".