212321542 has 16 divisors (see below), whose sum is σ = 346060800. Its totient is φ = 97328520.

The previous prime is 212321539. The next prime is 212321569. The reversal of 212321542 is 245123212.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 88942 + ... + 91297.

It is an arithmetic number, because the mean of its divisors is an integer number (21628800).

Almost surely, 2^212321542 is an apocalyptic number.

212321542 is a deficient number, since it is larger than the sum of its proper divisors (133739258).

212321542 is a wasteful number, since it uses less digits than its factorization.

212321542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180291.

The product of its digits is 960, while the sum is 22.

The square root of 212321542 is about 14571.2573925520. The cubic root of 212321542 is about 596.5745008472.

Adding to 212321542 its reverse (245123212), we get a palindrome (457444754).

The spelling of 212321542 in words is "two hundred twelve million, three hundred twenty-one thousand, five hundred forty-two".