212523742 has 8 divisors (see below), whose sum is σ = 320897232. Its totient is φ = 105558000.

The previous prime is 212523739. The next prime is 212523743. The reversal of 212523742 is 247325212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212523742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212523743) 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, 351559 + ... + 352162.

It is an arithmetic number, because the mean of its divisors is an integer number (40112154).

Almost surely, 2^212523742 is an apocalyptic number.

212523742 is a deficient number, since it is larger than the sum of its proper divisors (108373490).

212523742 is a wasteful number, since it uses less digits than its factorization.

212523742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703874.

The product of its digits is 6720, while the sum is 28.

The square root of 212523742 is about 14578.1940582502. The cubic root of 212523742 is about 596.7638191972.

Adding to 212523742 its reverse (247325212), we get a palindrome (459848954).

The spelling of 212523742 in words is "two hundred twelve million, five hundred twenty-three thousand, seven hundred forty-two".